Folder 1: notes on manuscripts, manuscripts to see and to be copied, in particular Biblioteca Apostolica Vaticana and Biblioteca Medicea Laurenziana manuscripts, 1965-1981 and n.d. [c.1965-1980]. Notebook with loose inserts.

Folder 2: papers including notes on photographic orders, relating in particular to Bodleian Library and British Library manuscripts, and 'manuscripts to see', 1966-1975 and n.d. [c.1966-1970]

Folder 3: papers relating to Poggio manuscripts, including a photograph of a letter by him received by de la Mare from Gordon Adamson, 7 Nov 1974, 1974 and n.d. [c.1974]

Folder 4: 'Catalogue of the Library of St. Anthony at Venice, From Vat. lat. 3960 (separate quire)', transcript apparently by L.G. Westerink, [1962], with a note by de la Mare, 'From Ruth Barbour, rec[eived] 6.6.[19]88'

Folder 5: notes on manuscripts, some relating to Bartolomeo Sanvito, including a short description of Vatican City, Biblioteca Apostolica Vaticana, Pal. lat. 1488 (Cicero, Philippics, early Piero Strozzi, Sanvito arms) and 'Ege hum[anistic] frag[men]t[s], S[an]v[ito] Hours, known leaves', 1998 and n.d. [c.1990-1996]

Folder 6: 'Padua s.XIV-XV', including correspondence with Christie's New York, Feb 2001, and related images regarding the sale of the collection of Helmut Friedlaender, which included ten illuminated manuscripts, 2001 and n.d. [c.2000]