mercredi 24 février 2021

La construction des pyramides égyptiennes selon Leslie Grinsell - 2e partie : les matériaux et leur transport

illustration extraite de l'ouvrage de Grinsell
 

Sources and Quarrying of the Soft Stones 

(I) Coarse limestone was normally obtained from the immediate vicinity of each pyramid. Coarse limestone quarries used for the Gîza Pyramids have been located around the Sphinx, south-east of the pyramid of Mycerinus, and south-east of the pyramid of Khephren. Quarries of coarse limestone for the Dahshur north pyramid are located south-west of that pyramid, to which they are connected by causeways. There is textual evidence that the coarse limestone for both of the Lisht pyramids was obtained from a quarry near the north Lisht pyramid.
 
(II) Fine limestone was used extensively for casing the pyramids, lining their passages and chambers, and lining the walls and pavements of the temples and causeways. The main source of supply was from the Moqattam-Tura-Ma'sara caves between Cairo and Helwan, which were worked from Dynasty III onwards. 
The history of these caves may be briefly related. Examination of the limestone facing of the pyramids and associated buildings of Dynasty III leaves little or no doubt that the quarries in question were being worked during that period. The earliest textual references to the Tura Quarries are of Dynasty VI. Among the titles of one Meryrê-‘ankh of this Dynasty was "Overseer of the Tura Quarries". A papyrus letter of Dynasty VI found at Saqqâra and now in the Cairo Museum (No. 49623) was written by an officer in charge of Tura quarrymen, and complains of delay in issuing clothes to his men. It is unfortunate that any Old Kingdom inscriptions that may have existed in the quarries themselves must have been destroyed by later quarrying. 
During the Middle Kingdom the quarries were extensively worked, and it is to this period that the earliest known surviving quarry inscription belongs. It described "the opening of the quarry-chambers anew in order to quarry good white stone of Tura for the buildings of this priest, of millions of years", and was written during the reign of Ammenemes III. 
During the New Kingdom and later, the quarries continued active, and about a dozen hieroglyphic inscriptions on the quarry walls are referable to these times. The working of the quarries has continued until the present day, and is still flourishing. 
Although most of the caves are now closed to the public, a few are still accessible, notably two examples at the Bektashi Monastery south of the citadel at Cairo, and two or three examples at the north end of the Tura group, accessible by road from Tura-Cozzika Railway Station.

The following features of the caves are of interest : 
1. Rows of notches arranged vertically on the walls ; these were footholds for the workmen to climb to the top of the quarry faces. 
2. Ledges beneath the ceiling at the top of each quarry face, where the quarrymen squatted in order to extract the stone. 
3. Parallel striae on each quarry face, caused by the use of copper chisels and adzes. 
4. Lines, symbols, and inscriptions on the ceilings, giving directions for quarrying and probably describing the progress of work.

The ancient quarrying of fine limestone was divided into two main operations : 
1. Working downwards with chisels or adzes on the four vertical sides of the block to be extracted. 
2. Striking the horizontal blows along the base in order to detach the block ; this was a comparatively easy process.
There is some evidence that convicts and prisoners of war constituted a considerable portion of the quarry labour. Convict labour is still used at Tura, and two mutilated inscriptions of Ahmose I (Dynasty XVIII) refer either to the Fenkhu (Phoenicians) or to cattle belonging to the Fenkhu as having been employed in the quarries.

(III) Alabaster was used for flooring the lower and upper temples of Khephren, and the upper temples of Unis and Teti. It was especially in demand for altars (that of Neuserrê at Abu Girâb) and offering tables (Mernerâ, Udjebten, and many others). 
The quarries at Hatnub about 25 km. east of El Amarna were the main source of supply during the Old and Middle Kingdoms. They contain inscriptions of the reigns of Kheops, Teti, Pepy I and II, Mernerê, Sesostris I and III, and Ammenemes II. The inscription of Uni, in Cairo Museum, described his journey to Hatnub in order to get an alabaster offering table for the pyramid of Mernerê.
There was also a small alabaster quarry in the Wadi Garâwi about 8 km. south-west of Helwan, which was worked during the Old Kingdom. 
The method of quarrying alabaster was similar to that for limestone, the chief tools used being probably copper chisels and adzes.

Sources and Quarrying of the Hard Stones

(1) Granite used very occasionally during Dynasties I and II, and for the main burial chamber of the Step Pyramid of Djeser at Saqqâra. From Dynasty IV onwards its use became common, notably in the pyramid complexes of Kheops, Khephren and Mycerinus. It was nearly always used for the portcullis slabs and other important parts of the interior of the pyramids of the Old Kingdom. Where roof-spans were more than about 3 metres, as in the so-called King’s chamber of the pyramid of Kheops, granite had to be used as limestone tends to crack if used for roofing such spans. When there was difficulty in getting granite, blocks of limestone were sometimes used instead and painted to resemble granite, (e.g. the false door of Udjebten ; the tomb of Mehu at Saqqâra, and many other instances). 
The source of supply of nearly all the granite used in ancient Egyptian building was the neighbourhood of Aswân, especially Elephantine Island. The beautiful red variety was most frequently used, but occasionally black granite was employed, notably for lining the walls of the north corridor of the upper temple of Mycerinus. The pyramidia were always of a black or grey-black stone, either granite, basalt, or schist. 
Among the Old Kingdom references to the quarrying of granite from Elephantine Island are two of special interest. That relating to the quarrying and transport of granite palmiform columns for the pyramid temples of Unis occurs in the form of reliefs and inscriptions on the walls of the causeway of that king’s pyramid at Saqqâra. The inscription of Uni in Cairo Museum includes an account of his journey to Elephantine to get a granite false door, offering slab, and doorway settings and thresholds for the pyramid complex of Mernerê.
Although there are great numbers of hieroglyphic rock inscriptions in the Aswân area, those so far published do not include references to the granite quarries, and there can be little doubt that the quarry inscriptions have been destroyed by later workings. 
The rounded surfaces of some of the untrimmed granite casing blocks of the pyramid of Mycerinus show that they were derived from boulders from the river at Aswân. On the other hand the large slabs used e.g. for roofing the King’s chamber of Kheops must have been quarried.
The ancient quarries south of Aswân are famous for the unfinished obelisk still in its original quarry, which exhibits the characteristic laboriously pounded faces and shows a few of the masons’ guide lines and other symbols in red ochre. In the vicinity of the ancient quarries are large numbers of pounders of greenish-black dolerite, used in quarrying and working all kinds of hard stone. It is certain that saws were also used in working granite and other hard stones, as saw-marks often occur on them. 

(2) Basalt. Black or dark grey basalt was used for flooring the upper temples of Kheops, Userkaf, Sahurê and Neuserrê. The material may have corne from Gebel-el-Qatrâni in the Faiyûm.

(3) Schist was often used for statues and offering vases, but seldom for building material. The main source of supply was the celebrated quarries of Wadi Hammâmât between Qus and Quseir, which contain some 250 hieroglyphic inscriptions, including examples of the reigns of Pepy I, the Mentuhotpes, Ammenemes I and III, Sesostris III, and many of later date. Among the inscriptions of the reign of Pepy I is a reference to a pyramid builder named Tjetjy. 
The quarrying of schist and other hard stones was sometimes accompanied by curious ritual. The inscription of Intef (Dynasty XII), in the Hammâmât quarries, relates how he prostrated himself before all the gods and goddesses of the desert, including Min and Mut, and burned incense to them, in order to obtain their assistance in guiding him to a large and sound block of stone, the like of which had never been brought since the time of the gods. 
On other occasions animals were sacrificed after suitable stone had been found. 
The numbers of men sent on some of the quarrying expeditions to Wadi Hammâmât often ran into thousands. Ammenemes III for example sent an expedition of 2,000 troops, 20 necropolis soldiers, 30 sailors, and 30 quarrymen to those quarries in order to quarry and hew ten statues, each of which was 5 cubits (about 8 1/2 feet) high.

(4) Quartzite. Although quartzite was used in Dynasties IV and VI  for statues of Djedefrâ and in the upper temple of Teti, it was not employed extensively until Dynasties XII and XIII, when it was used for the sarcophagus of Ammenemes III at Hawâra, and for portcullis slabs, sarcophagus chambers, and/or sarcophagi of Middle Kingdom pyramids between Saqqâra and Mazghûna. The main source of supply was most likely the quarries at El Gebel el Ahmar, about 10 kilometres north-east of Cairo, where hieroglyphic inscriptions of late date existed until recently. On the site there are still quarry-faces marked with red guide-lines to aid the quarrymen, and there is an unfinished recumbent royal statue. Dolerite pounders are common in the vicinity. North of Aswân is the remnant of another ancient quartzite quarry.

(5) Sandstone. Sandstone was seldom used in the building of any parts of the pyramid complexes, except at the pyramid-temple of Mentuhotpe II-III at El Deir el Bahari. There is evidence however that the sandstone quarries of the Western Nubian Desert, about 65 kilometres north-west of Abu Simbel were worked during the reigns of Djedefrê, Djedkarê-Isesi, Ammenemes I, Sesostris I (period of co-regency), and Ammenemes II and III. The earliest inscriptions in the sandstone quarries of Gebel Silsila, between Luxor and Aswân, are of Dynasty XVIII.
 
Sources of Other Materials. 
(1) Copper, for implements used in quarrying, probably all came from the mines in the vicinity of Serâbit el Khâdim and Wadi Maghârah in south-eastern Sinai where there are many inscriptions of Old, Middle and New Kingdoms. 
(2) Gold was used extensively for the royal grave furniture, nearly all of which was looted long ago. The articles from the tomb of Hetepheres (mother of Kheops) now in Cairo Museum may be taken as a sample of what every royal tomb of Old or Middle Kingdom must have contained. The source of supply was the quartz veins running through the granite, especially between Qena and Quseir in Upper Egypt.  
(3) Faïence was used in Dynasty III in the blue tile chambers of the monument of Djeser at Saqqâra. It is believed to contain natron from the Wadi Natrûn.
(4) Woods, imported largely from Syria, included ebony (from Dynasty I), juniper (from Dynasty III), fir (from Dynasty V), yew (from Dynasty VI) and cedar (from the Middle Kingdom and probably earlier). A coffin of cypress (Dynasty III) was found in the Step Pyramid at Saqqâra.

Transport of stone from quarry to pyramid, which may have been done with the assistance of oxen, involved the following operations :
(1) Transport from the quarry to the water’s edge. This process was often facilitated by constructing an embankment or causeway. Such embankments or causeways still exist at the granite quarries of Aswân, the alabaster quarries of Hatnub, the basalt quarry in the Faiyûm, and the limestone quarries in the Moqattam-Tura-Ma'sara area. The stones were moved on sledges as depicted on a stela from the Tura caves. At the river’s edge there was most likely a quayside (mryt) on which the blocks of stone were unloaded before embarkation. 
(2) Transport by river to the western bank. In the case of the transport of fine white limestone from the Moqattam-Tura-Ma‘sara area this merely involved the short journey across the river, and may have been done by a type of barge of which models were found near the pyramid of Queen Neit. Most of the transport across river was done during the inundation season in order to minimise land transport.
Accounts of journeys downstream with stone from the Upper Egyptian quarries have survived mainly in the inscription of Uni, who gave a detailed account of his expeditions to Upper Egypt to get materials for the pyramid complex of Mernerê at Saqqâra. He transported the alabaster from Hatnub in a cargo boat 60 cubits long and 30 cubits broad, built in 17 days. (...)
On the walls of the causeway of Unis at Saqqâra are reliefs and inscriptions of 'the coming (of the ships) from Elephantine Island loaded with red granite columns and cornice-blocks for the pyramid called ‘"the Places of the Son of Re Unis are beautiful"'. Carl V. Solver suggests that advantage was taken of a rising Nile for transport of stone from Upper Egypt, in order to minimise the risk of the vessel grounding on the way.
On the western bank of the river there were quaysides for the unloading of the stone. A block of fine white limestone from the Pyramid of Sesostris I at Lisht was inscribed, 'Brought from the
Rekhet landing stage'. It is possible that some of these quay-sides may have later served the lower temples of pyramids, as quays have been found near the lower temples of Sahurê, Neuserê, and Unis.
(3) Transport from the western bank of the river to the site of the pyramid was effected by sledges of acacia or cedar, evidences of which have been found near the pyramids of Sesostris III at Dahshûr and Sesostris III at Lahûn. It seems probable that most of the stone was taken to each pyramid along the causeway connecting the sites for the upper and lower temples."

extrait d' Egyptian Pyramids, 1947, par Leslie Grinsell (1907-1995), archéologue et conservateur de musée anglais. Durant la Seconde Guerre mondiale, il a rejoint la Royal Air Force et a servi en Égypte, où il s'est familiarisé avec les vestiges archéologiques de l'Égypte antique.