de Ricci, p. 172
Cockerell usally signed and dated his purchases in the upper rigth corner of the first flyleaf:

He also very often made lengthy notes in ink in his imediately recognisable handwriting, especially concerning provenenance, the upper pastedown or a flyleaf:


He had many of his mansucripts rebound by Katharine Adams, who signed her work in the gutter corner of the turn-in of the back cover (to which Cockerell usually added a note including the date):