In his paper 'Les codices documentaires egyptiens', delivered to a Sorbonne colloquium on the origins of the codex in July 1985, Jean Gascou assigned the date and the subject-matter of the Hermopolite Graeco-Coptic account book BM 1075 to the first half of the sixth century, on the basis of its reckoning by talents and myriads of talents (thus identifying the abbreviation-signs, correcting Crum's - based on Kenyon - reading of them as meaning myriads of artabas of grain).