Reconstructing the Desert and Sown Landscape of Abydos
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Transcript of Reconstructing the Desert and Sown Landscape of Abydos
Reconstructing the Desert and Sown Landscape of AbydosAuthor(s): Joshua TrampierSource: Journal of the American Research Center in Egypt, Vol. 42 (2005/2006), pp. 73-80Published by: American Research Center in EgyptStable URL: http://www.jstor.org/stable/27651799 .
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Reconstructing the Desert and Sown Landscape of Abydos
Joshua Trampier
In 2004, the Ahmose and Tetisheri Project Geographical Information System (ATP-GIS) was created
primarily to integrate satellite imagery with site plans, survey maps, and vector data in order to inves
tigate the secular and sacred New Kingdom constructions in the desert periphery. Yet the pan oramic nature of satellite imagery challenges
one to broaden one's perspective to encompass the
largely unexplored cultivation. In the cultivation zone, there is evidence of what seems to be a net
work of relict canals, as well as relict mounding from historic earthworks and/or settlement. In
December 2004, the investigators traveled to several of these locations to assess these cropmarks and mounding. Since this groundtruthing work was chiefly meant to be a feasibility study, this paper will discuss preliminary findings and the future trajectory of the ATP-GIS.
This area was chosen to utilize remote sensing imagery for both site prospection and conservation
in the cultivated and desert zones of the Abydos region. As many have noted, survey in the floodplain in particular has become increasingly urgent for the sake of site preservation and conservation.1
Explosive agricultural, settlement, and cemetery expansion in the decades following the completion of the Aswan High Dam in 1970 threatens sites that were once secure in the desert periphery. Koms
(site mounds in the floodplain) continue to be "harvested" by local farmers for their nitrate- and
phosphate-rich sebbakh, slowly eroding any perceptible relief?and thus stratified settlement?from the
floodplain. Plowing continues to obscure cropmarks that could reveal ancient route systems, canals,
or walls.
The monuments and floodplain settlements of Abydos are far from immune to these effects, and
active steps need to be taken to preserve their cultural heritage. Remote sensing imagery can thus be
an invaluable aid for arriving at informed decisions about concession management, site location and
preservation, and, if necessary, salvage excavations. Remote sensing is a technology that archaeologists
familiar with aerial photography have quickly seized upon for site detection and analysis.2 Corona
imagery in particular provides high resolution views for a minimal amount of cost and effort.3 This
An earlier version of this paper was presented at the 2005 Annual Meeting of ARCE held in Boston, Massachusetts. Many thanks to the Supreme Council of Antiquities and the Sohag inspectorate for their cooperation and support of our research at
Abydos. I would like to thank project director Stephen Harvey for his invitation to work on this material, his initial observa
tions of the cropmarks, and my inclusion on the Ahmose and Tetisheri Project 2004 team. My sincere thanks to Scott Branting,
Jennifer Starbird, and Amber Meriwether for their helpful comments on earlier drafts. 1 See, for example, E. van den Brink, "A Geo-Archaeological Survey in the North-Eastern Nile Delta, Egypt; the First Two
Seasons, a Preliminary Report," MDAIK 43 (1986), 7-9. on the reasons why survey in the cultivation is crucial. 2 D. R. Wilson, Air Photo Interpretation for Archaeologists, 2nd ed. (Stroud: Tempus, 2000). Also, an extensive bibliographical
database of archaeological prospecting using aerial imagery is provided by the Aerial Archaeology Research Group website at
aarg.univie.ac.at. 3 USGS. Declassified Satellite Imagery?1 (1996) edc.usgs.gov/guides/displ.html, USGS. Declassified Satellite Imagery?2 (2002)
edc.usgs.gov/products/satellite/declass2.html. CORONA actually refers to images captured by the satellite series of the same
name, but the term has come to encompass those images taken by the LANYARD and ARGON satellites as well. According to
the National Reconnaissance Office of the United States, CORONA was the first satellite system to conduct reconnaissance
73
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74 JARCE 42 (2005-2006)
Fig. 1. South Abydos as visible in 1968 on a Corona satellite image (left). The same area in 2000 within an ASTER
satellite image (right) shows tremendous agricultural, settlement, and cemetery expansion into the desert fringe. ASTER
pixilation is due to the lower degree of image resolution relative to the Corona.
article will not attempt to analyze various types of remote sensing imagery with their attendant advan
tages and disadvantages nor provide a comprehensive list of sources for imagery.4 However, one
should note that the Center for Ancient Middle Eastern Landscapes (CAMEL) research facility based
in the Oriental Institute is developing into an indispensable digital archive for all satellite imagery, aerial photographs, and maps of varying scales of the greater Middle East.5
One advantage of remote sensing imagery layered within a GIS is their ability to reflect changes in
the historical landscape and how these changes relate to archaeological remains. Figure 1 (left) shows a Corona view of north and south Abydos as visible on Nov. 15, 1968.6 The dark areas running north
west to southeast represent the area under cultivation, and major monuments lie along the desert
fringe. To the southwest is the high limestone escarpment (the gebet). Note that the line of cultivation
is fairly constant, though there are some minor field systems into the desert northwest of the Kom es
from space. From August 1959 to May 1972, the system obtained over 800,000 images of the Earth. An Executive Order of
President Clinton in 1996 began the process of declassifying these spy satellite images, making them available for commercial
use. A second lot of satellite imagery was declassified under President Bush in 2002, and conceivably more detailed imagery will be declassified in the future. To obtain Corona imagery, see the USGS website at earthexplorer.usgs.gov. The most favor
able missions for Egypt are KH-4A, 4B, and KH-6, with image resolution as high as 67pixel. In the highest resolution imagery, locations such as the Aswan High Dam, the Suez Canal, and the Heliopolis airport were targeted because of their strategic im
portance. See Missions 4018 and 4026-4029 for high-resolution views of Aswan. 4 For a partial imagery list relevant to Egypt, see S. Parcak, "Satellite Remote Sensing Resources for Egyptologists," GM
(2004), 63-78. To Parcak's list of remote sensing sources for Egyptologists should be added two free online databases with
worldwide coverage, both of which use at least medium resolution imagery (15-30 m). These are the Global Land Cover Facil
ity of the University of Maryland (www.landcover.org) and Google Earth (earth.google.com). The former has the advantage of
downloading (principally) Landsat imagery for use in one's own GIS software, while the latter presents imagery of varying res
olutions in a seamless, awe-inspiring experience of the entire globe. 5 The Center for Ancient Middle Eastern Landscapes (CAMEL) defines its area of collection as "an enormous box stretch
ing from Greece on the west to Afghanistan in the east, and from the middle of the Black Sea on the north to the horn of
Africa in the south ... By functioning as a central repository for this data, CAMEL can . . . offer researchers the ability to grap
ple with larger regional issues in a manner that has never been possible before" (taken from the FAQ of the CAMEL website, accessible from the projects area of the Oriental Institute website, oi.uchicago.edu. Accessed July 1, 2006).
6 Corona mission 1105-2, frame 057.
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Reconstructing the Desert and Sown Landscape of Abydos 75
Sultan, around the Seti I temple complex, and to the southeast of the Ahmose Pyramid. Fig. 1 (right) shows the same region in 2000, this time with an ASTER near-infrared image.7 Note the dramatic ex
pansion of fields and roads into the desert to the northwest, west, and southwest of the wall-enclosed
Kom es-Sultan (the local center of Osiris and Khentyamentiu cults) and the Shunet ez-Zebib (the funer
ary enclosure of the Second Dynasty King Khasekhemwy). Mottled sand to the east-southeast reflects
over a century of extensive excavation of the nearby cemeteries and the residual spoil heaps from this
excavation. Cultivation has also encircled the buildings of Seti I temple complex and materialized
to the northeast of Umm el-Qa'ab, the burial mounds of the Early Dynastic kings, and traces of past excavation are also visible here. In the southeast, recent excavations have centered on the Middle
Kingdom settlement of Wah-sut.8 Its orthogonal planning can still be seen in the dark remains of
its mudbrick walls. Further southeast are the cult temples of Ahmose and Ahmose-Nefertary; the
horseshoe-shaped mound of the pyramid is visible from space.9 To the northwest of the pyramid lies
the "Ahmose Town": several estates with Egyptian, Mycenaean, Cypriot, and Pan-Grave ceramics,
along with administrative ostraca, scarabs, and domestic remains.10 This New Kingdom village likely housed the staff of the cults of Ahmose, his wife, and his grandmother.11 Excavations in 2004 pro duced a beehive granary preserved to a height of over 1 m surrounded by an array of New Kingdom mud sealings, several with the prenomen of Thutmose III.12 The extent of Ahmose Town and its
stratigraphie and positional relationship with nearby Wah-sut is still under active investigation by both
the University of Pennsylvania and University of Chicago teams.13
Rapidly determining and protecting the preserved remains of the Ahmose town and its monu
ments is critical, as ATP excavations in 2002 revealed a series of temples whose foundations were typi
cally preserved only to a brick or two in height. It is probable that the southwestern portions of the
town include the grayish patches between Wah-sut and the Ahmose pyramid in the Corona in Fig. 1
(left). On the right, an ASTER image (Fig. 1 right) shows the Ahmosid monuments and town threat
ened by Nag' el-Ghab?t; already, its cemetery has begun to expand over industrial areas and temples revealed by magnetometry survey.14
In Figure 2, the level of modern encroachment around the an
cient features and excavations is quite clear. An unexplored rectilinear structure visible in the Corona
is now obscured by the same cemetery. With the aid of this remote sensing imagery, efforts are under
way to build protective fencing for each site concerned. It is clear that the Ahmosid monuments are
in danger of being lost for good if the modern town continues its trend of expansion into the desert.
7 ASTER image captured Sept. 17, 2000, ID# ASTJL1B.003:09172000085103. ASTER imagery can be obtained from NASA at edcimswww.cr.usgs.gov/pub/imswelcome. The resolution of ASTER imagery is relatively lower than Corona, resulting in a
pixilated view when zooming in closer than 1:50,000. Figure 1 is at a scale of roughly 1:15,000. 8 J. Wegner, "A Middle Kingdom Town at South Abydos," Egyptian Archaeology 17 (2000), 8-10, J. Wegner, "The Town of
Wah-sut at South Abydos: 1999 Excavations," MDAIK 57 (2001), 281-308. 9 S. Harvey, "New Evidence at Abydos for Ahmose's Funerary Cult," Egyptian Archaeology 24 (2004), 3-6, S. P. Harvey, "The
Cults of King Ahmose at Abydos" (Ph.D. diss., University of Pennsylvania, 1998). See more recently the article on the Ahmosid
monuments' ceramic sequence in J. Budka, "The Oriental Institute Ahmose and Tetisheri Project at Abydos 2002-2004: The
New Kingdom Pottery," ?gypten und Levante 16 (2007), 83-120. 10 K. R. Ayrton, M.A. Currelly, and A. E. P. Weigall, Abydos Part III. 1904 (London, 1904), 37-38, LIII-LVIII, LX. 11 Surface survey in 1991 by ATP to the northwest of the Ahmose pyramid revealed a large concentration of bread molds,
beer jars, and other domestic or industrial remains. In 2002, Tomas Herbich produced a magnetometric survey of the same
area, revealing an area heavily trenched in 1966 by the Egyptian Antiquities Organization; on the surface, with little overt evi
dence of architecture. Trenches are visible as criss-crossing linear features in fig. 2. 12
Compare to Ayrton, Currelly, and Weigall, LVII at bottom, unnumbered. 13 Wegner, "The Town of Wah-sut at South Abydos: 1999 Excavations," 282-85, in figs. 1-2, 304-8.
14 S. Harvey, "Abydos," in The Oriental Institute 2002-2003 Annual Report, ed. G. Stein (Chicago, 2003), 22-23, fig. 2.
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76 JARCE 42 (2005-2006)
Fig 2. This oblique view illustrates in stark detail how modern cemetery walls have come to the very edge of the collapsed Ahmose pyramid and its town. The high-resolution image is a Digital Globe Quickbird satellite photo taken between 2002
and 2006 obtained from the Google Earth Mapping Service. It has been draped over a DEM generated from topographic points measured in 1993 (vertical features exaggerated 2x). Beneath the Quickbird image is the Corona image from Fig 1.
Square excavation units in the vicinity of the Ahmose monuments have been shown for reference.
Beyond the desert landscape of Abydos, the floodplain presents an interesting challenge for archae
ological prospection and conservation. The panoramic nature of satellite imagery affords one the
opportunity to investigate the cultivation for evidence of earlier human activity there. Once again, it is useful to observe the changes in the modern landscape, so as to establish a baseline for comparison
with evidence for ancient settlement and irrigation. Fig. 3 shows the modern hydrology of the Aby dos region as related to observed changes in irrigation from the last two centuries. The el-Kisra canal and a longitudinal dike running northwest/southeast divide the main basins (hods) of the west bank, Beni Himeil and Bardis, into eastern and western portions. Willcocks' and Ross's hydrological sur
veys conducted a little over a century ago show little deviation from this basic system of canals.15
However, the Description de l'Egypte from roughly two centuries ago names only the meandering Abu Ahmar canal, which roughly overlaps with and has been replaced by the modern el-Kisra canal.16
Digital elevation models (DEMs) can prove useful in detecting the negligible mounding in the Nile
floodplain that conceals settlement remains, relict channels, pools, dikes, and levees. From an ASTER
15 Col. J. C. Ross, Maps of Upper Egypt in Systems (Cairo: National Printing Office, 1892), pi. 19, W. Willcocks, Egyptian Irriga tion, 2nd ed. (London-New York, 1899), pi. 13.
16 Commission des sciences et arts dEgypte, Description de VEgypte: ou, Recueil des Observations et des Recherches qui ont ?t? faites en
Egypte pendant VExp?dition de VArm?e Fran?aise. Carte topographique, 9 vols. (Paris, 1828).
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Reconstructing the Desert and S
Fig. 3. The modern hydrology of the Abydos region as derived from the 1938 Survey of Egypt map of Nag' Hamm?di (1:100,000) and compared to hydrology in Ross (1892) and the Description de
l'Egypte (1828).
Fig. 4. Contour map of the Abydos region derived from an ASTER
DEM compared to basin dikes in Ross (1892).
Landscape of Abydos 77
DEM, it is possible to derive a contour map accurate to 10 m.17 Fig. 4 shows the region of interest with 10 m contour intervals dis
played as a vector overlay. Intervals greater
than 70 m above sea level were selected to
reduce clutter in the figure; moreover, only contours to the northeast of the el-Kisra
canal and west of the Nile have been dis
played. Based on its shape and orientation, one series of contour intervals running per
pendicular to the el-Kisra and Awlad Iliew
canals may be the remains of a transverse
dike. For comparison, the dikes noted in
Col. Ross' survey and the Description volume
have been plotted, revealing that the trans
verse dike precedes the features mapped two centuries
ago.18 Contours to the north
west of the "transverse dike" are also in
triguing, though these elements have not
yet been groundtruthed. Nevertheless, the
transverse dike and these contours may be
connected to the cropmark features in the
Corona imagery discussed below.
Among the modern canals of the Abydos
region is a network of braided channels that
likely represent a much older hydrological framework. The channels have long since
been silted up and filled in, but cropmarks on the fields testify to their existence. Crop marks are subsoil features produced by bur
ied archaeological or geological features.19
When crops ripen, the presence of a subsoil stone wall may stunt the growth of these
crops, because the wall causes water to drain
away more quickly than if there were only soil present (negative cropmarks). Conversely,
17 Medium resolution, ASTER DEMs such as ours are available from the NASA JPL for $80 per 60 km x 60 km swath. To
request an on-demand DEM, go to edcdaac.usgs.gov/asterondemand after one locates a stereo-pair of ASTER images in the
EOS data gateway at edcimswww.cr.usgs.gov/pub/imswelcome. 18 Ross 1892, pi. 19; Description d'Egypte. 19 W. S. Hanson and I. A. Oltean, "The Identification of Roman Buildings from the Air: Recent Discoveries in Western
Transylvania," Archaeological Prospection 10 (2003), 114-16, T. M. Lillesand and R. W. Kiefer, Remote Sensing and Image Interpre tation (New York: Wiley, 1999), 277-80, D. R. Riley, "The Frequency of Occurrence of Cropmarks in Relation to Soils," in The
Impact of Aerial Reconnaissance on Archaeology, ?d. G. S. Maxwell (London, 1983), 59-73, Wilson, Air Photo Interpretation for
Archaeologists, 67-87. Cropmarks are to be distinguished from soil marks visible on bare soil. Nor are these shadow marks
features visible from the air due to (sharp) changes in relief that appear in oblique sunlight (cf. Wilson, Air Photo Interpretation
for Archaeologists, 38-67).
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78 JARCE42 (2005-2006)
Fig. 5. Overview of cropmark features in the Abydos region rela
tive to modern features.
the additional moisture and nutrient depos its in a silted-up canal elicit a positive crop
mark recognizable as a dark linear feature on
an aerial or satellite image. Dry conditions
only enhance these differences. Cereal crops,
particularly wheat and barley, give marks of
especially good definition and resolution.
Cropmark features in the Abydos region were quite common over an area of roughly seven square kilometers, oriented south east to northwest, and when mapped they revealed an extensive pattern of singular and
braided channels suggestive of waterways
(Fig. 5). Detected cropmarks have been clas
sified by an observed degree of detectability,
following supervised pixel classification in
ArcView to enhance these features. Those
that appear quite darkly and distinctly on
multiple Corona imagery are drawn as a thick
black line, less obvious features on multiple
images are rendered in a thinner dark grey line, and ephemeral features appearing on
only one image are thin and light grey. It
should be noted that not every Corona mis
sion showed evidence of these cropmarks. Seasonal moisture levels, soil conditions,
crop type and crop maturity regularly ob scure cropmark visibility. For instance, crop
marks in this region were virtually invisible
in September 1967 and August 1968. Yet
Fig. 6 reveals the same region from May 1968 where cropmarks appeared as light and dark grey lines and patches in the soil,
generally ranging in width from five to
nearly twenty meters across. It is important to note how these cropmarks cut across
modern field systems and roads, hinting at
the cropmarks' antiquity. As one can see
from the series of light grey, roughly parallel lines in the upper left corner (labeled *T), the cropmarks are generally oriented south
east-northwest. Several features like the channel marked '2' appeared to be connected to a larger
hydrological framework, if one follows this channel south to a large dark patch located 200 meters
east of waypoint 135. Another light channel (about 500 meters of which is visible) emerges meters
west of where channel '2' intersects feature '3.' The large, dark area has provisionally been designated the "harbor," measuring approximately 660 meters long by 70 meters wide. For comparison, the
Fig. 6. Detail of dark cropmark features visible on a corona sat
ellite image (Corona image courtesy of USGS and NASA).
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Reconstructing the Desert and Sown Landscape of Abydos 79
Table 1. Visibility of cropmarks on selected Corona mission dates
Mission Date Visibility Season Moisture Crop maturity Possible crops
DS1101-1 9/18/1967 Nearly invisible Inundation Flood Little/no growth Wheat, barley, flax, sugar cane
DS1103-1 5/6/1968 Highly visible Summer Low Little/no growth Bersim, lentils, onions, sugar cane
DS1104-1 8/12/1968 Nearly invisible Early flood Increasing Little/no growth Wheat, barley, flax, sugar cane
DS1105-2 11/18/1968 Moderately visible Post-flood High Moderate growth Wheat, barley, flax, sugar cane
Theban sacred lake isheru measures about 140 by 90 meters, and the Birket Habu at Amenhotep Ill's
palace at Malqata measures 2.4 km long and 1 km wide. In general, the cropmarks in this region were
much more visible after the inundation had receded, when crops were maturing or during the early summer (see Table 1). Soil cropmarks were barely visible during the inundation season.
Uploading the cropmark shapefiles to a Garmin V GPS unit, the investigators were able to travel
straight to these features. However, during early December at the time of this investigation, many of them were inaccessible because of tall crops. For instance, the "harbor" was deep within a grove of
sugar cane. Waypoint 138 (see Fig. 6, right) was taken standing atop a major waterway, and there was
little ground cover at the time. Yet the features visible from the Corona were invisible on the ground, though the ground itself exhibited a perceptibly higher degree of moisture retention in the soil in the features. Seasonal difficulties certainly inhibit one from displaying direct documentation of this
phenomenon, though it is not certain that they would be visible from the ground even in ideal condi tions. Still, this encourages one to return to the region in early
summer when an immature second
crop or low groundcover may make these features more readily documentable.
Without directly associated archaeological materials or excavation, one cannot speedily classify the
waterways as culturally-produced, date them, or know their depth. Non-systematic surface collection
resulted in a few red-burnished body sherds and modern thick-bodied zir sherds. The red-burnished sherds could have been produced anytime between the Naqadan and Roman periods. In future sea
sons, systematic coring in the canal beds would locate associated archaeological materials and pro vide valuable data on the depth of these canals as they relate to localized silting conditions for the
Abydos region.20 At this stage, one can only tentatively suggest that the cropmarks reflected in the local vegetation lie between -0.5-2.0 meters below the surface. 21
Yet the cropmarks may indeed
reflect a much deeper (and thus older) hydrological regime that gradually rose with the level of the
floodplain receiving an annual sediment load. Only coring and excavation will begin to address some of these questions.
Are the "transverse dike" and the intriguing contours to the northwest (see Fig. 4) linked to this
system of cropmarks, i.e., are they contemporaneous? It is too soon to say whether the mounds to the
northwest of the dike conceal a large settlement, though the area containing them is roughly 3.5 km2.
20 Said (1994, 59-61) estimates the thickness of the Nile Valley silts between Aswan and Cairo to be 8.5 m, based on an
average sedimentation rate of 10.3 cm/century. Localized data are not available. 21
Wilson, Air Photo Interpretation for Archaeologists, 71, observes that cropmarks cannot practically exist far below two
meters, based on the fact that the taproots of the crops that delineate them do not grow much deeper. Indeed, "the main root
ing zone of cereal plants is only 300-400 mm deep, but there is normally at least one long root that will penetrate, if need be, to depths of 1.2 m or more in search of water."
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80 JARCE 42 (2005-2006)
Nevertheless, the perpendicular orientation of the dike contour to both modern canals and the crop mark features compare well to Willcocks' idealized depiction of the basin system as used in Upper
Egypt.22
Summarizing what is known of the cropmarks, they share a general northwest/southeast alignment with modern hydrology, though they do not directly map onto modern canals or lie adjacent to mod
ern villages (see Fig. 3). The major cropmarks, including the "harbor," roughly bisect Hod Bardis. One
would suggest that these cropmarks indicate several feeder canals (likely operating at different times) for the basin(s) that preceded the Bardis. The orientation and shape of the canals implies cultural
usage, though one cannot rule out a natural origin for these waterways. Prior to the reforms of
Mohammed Ali Pasha, irrigation systems relied upon slight modifications of natural river channel
meanders, given limitations in manpower, organization, and technology.23 The highly sinuous Abu
Ahmar canal in the Abydos region from the Description de TEgypte seen in Figure 3 reflects reliance on
such meanders.
The cropmarks are virtually invisible from the ground, both due to high crops and seasonal mois
ture levels, and early May has been suggested as an ideal time for survey. Their age is as yet unde
termined, as is their association with the transverse dike, though geomorphological coring, intense
systematic survey, and test excavations would certainly begin to address some of these questions in
greater detail.
Satellite imagery, like aerial photography, are increasingly being used to impart a fresh perspective at the level of the site. Where satellite imagery can truly show its worth is its scalability, providing both a detailed view at the sub-site level and a panoramic view at the regional level. In the Abydos
region, remote sensing imagery conceptually links the desert fringe to the cultivation and serves as a
platform for new research. Future seasons should investigate additional cropmarks, contour mounds,
and other promising archaeological signatures in the remote sensing imagery, while simultaneously
integrating geophysical, survey, and architectural data from the other projects at Abydos. Through efforts to reconstruct ancient hydrology, earthworks, and settlement in the floodplain desert, one will
hopefully begin to develop a more holistic view of the ancient landscape of Abydos.
Oriental Institute
University of Chicago
22 Willcocks, Egyptian Irrigation, pi. 14.
23 H. E. Hurst, The Nile; A General Account of the River and the Utilization of its Waters (London, 1952), 46-47.
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