Another reader came across the manuscript at a time when it already had some pieces missing. We don’t know whether someone deliberately moved them, or whether they just fell out. For more on this question, follow this link.
A note of missing texts
Paris, BNF, fr. 837 (pre 1300), ff. 149v-150r
Reproduced by courtesy of Bibliothèque nationale de France: http://gallica.bnf.fr/?
This reader had access to something that let him know what all the texts were, either a table of contents or another, very similar manuscript. He decided to write in the names of all the missing texts, with numbers. We don’t know why he did this. Was it a desire for a sense of completeness?