Strabo visited Egypt in 30 AD. He mentions, in the city of Kerkasore, "which is located near the observatory of Eudoxus, at the Libyan side of the Nile, there is a visible watchtower from Heliopolis, in which Eudoxusa made observations of movements of celestial bodies. It is located in the nome of Letopolis ".
Other late texts position the nome Letopolis, the second in the list of Lower Egypt, near Memphis and Heliopolis. Letopolis often appears in the papyri of the Fayoum, to the point that some researchers have situated this nome was among them :
Also, when in 1991, during the laying of water pipes, accidental discoveries of ancient ruins took place, the name of the city was evident. This is an area to the west of the Nile, 4 km from the village of Abu Roach and 6 km southwest of Ausim. Their archaeological study, under the authority of Zahi Hawass and supervised by Ahmed el-Hamid, was undertaken by Mr. Jones. There are of the Old Kingdom, unknown so far, and on a large geographical area.
It is likely that this nome of Letopolis was very extended towards the west of the Nile.
On the walls of the White Chapel at Karnak, the name of the second nome of Lower Egypt is designated by the drawing of a thigh. Egyptian transliterated this corresponds to "Khem". It phonetically appears as a possible ancient pronunciation of Ausim : « Khem » would deformed in « Akhem », « Asem », Ausim.
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My notes of veracity :
The ruins of Ausim are the Letopolis of the Greeks, the Egyptian “Khem” : 3/5