Henry Julius Wetenhall Tillyard (1881-1968) was Professor of Greek at University College, Cardiff, 1926-46. He was an international authority on Byzantine music and the joint editor of Monumenta Musicae Byzantinae.
The collection contains a Codex Peribleptos. (Byzantine Sticherarium: hymns for fixed and movable days from the 15th century), and a photofacsimile of a transcript of Codex Peribleptos. The work is in two volumes, in buckram slip cases, probably bound in the 18th century.
The archive also contains an anthology of 18th century Russian Church music; an 18th century Russian musical manuscript containing hymns for the chief festivals, a leather-bound Greek service book and an 18th century Russian Church Hirmologium.
Shelved with the Tillyard Manuscripts is a collection of offprints of articles on Byzantine church music by H. J. W. Tillyard and St. V. Lazarevic.