Consisting of drafts by him of his own letters, a few letters to himself from others, Greek and Latin verses, collections for his Annales Typographici, critical notes, and miscellaneous scraps.

Many of his letters are to the duke of Rutland, and some to the young duke of Bedford. There are drafts of letters to him and Muratori from J. J. Zamboni.

Maittaire’s residence was (as appears by addresses of letters) in King Street, Bloomsbury.