Horace. Ars poetica with commentary of Aldus Manutius (Venice, 1576) Call number: PTT 2865.311.076. [Shelf mark on verso of front free endpaper, which is marbled on recto. The front paste-down is marbled. These are the only marks of ownership.]
	Charles Spencer, third Earl of Sunderland (1674-1722), his “books are easily recognizable by the bold shelf-marks written in ink on the verso of the upper cover in the upper left hand corner.” S. DeRicci, English Collectors of Books & Manuscripts (1530-1930) and Their Marks of Ownership (Cambridge, 1930), p. 39.

For more about the history of the Sunderland Library, see the record for the 18th century manuscript catalogue of the Library held at John Rylands Library:
http://archiveshub.ac.uk/data/gb133-engms62.txt