The document purports to be

Here, as at the apparent beginning of the Diary fragment, the Scholar uses the term 'document' to describe the Egderus materials, when in fact they comprised a sizeable archive of many documents by different authors.

A careful reading of the Scholar's evolving understanding of the materials suggests that they were discovered in batches (or delivered in installments), a development which seems to have distressed the Scholar seriously, if the separate fragment lamenting this fact is genuine.