A Topographical Catalogue of the Private Tombs of Thebes, p.10: "The numbers employed in this Catalogue are the same as will be found marked outside the actual tombs; it is greatly hoped that these will meet with general acceptance. It will be noted that the numbering follows no topographical order. It will pain the pedantically-minded — I confess it is not wholly pleasant even to myself — that, for example, tomb 42 should adjoin no 110, and access be had to 145 from 17. Such incongruities are for the most part due to the succession in which the tombs were discovered; in practice they do not in any way impair the utility of the numbering. The purpose in assigning numbers to the tombs is to provide a series of abbreviations to be used in quotation, and so long as the numbers given are easily referred to in a printed Catalogue it matters little what order they follow. Any attempt to modify our numbering at the present juncture would introduce serious confusion into the already somewhat chaotic literature of Egyptology. Scholars are therefore begged to make shift with it, whatever its imperfections."
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A. E. P. Weigall, ‘A Report on the Tombs of Shêkh Abd’ el Gûrneh and el Assasîf’, ASAE 9 (1908), 118–36: "As will be seen, I have renumbered them all, and I trust that in future these numbers will always be held to, so as to avoid confusion. The tombs have been numbered in a haphazard sort of way two or three times, and one often finds two or more numerals marked down for each tomb. A few years ago Mr. Newberry made out a complete list of new numbers, and Mr. Carter had these neatly painted on wooden boards. The list, so far as I can make out, was then lost, and the boards were piled in a back room, where I found them. They ran consecutively from 100 to about ho, but I could only find a few of the numerals below 40. For this reason, I commenced my numbering at 100, and outside the doorway of each tomb the number has been nailed so that there can be no mistake."