Thomson, James. The Seasons by James Thomson. New York: Printed for T.B. Jansen & Co, 1803.
Edward C. Muller. Price list of tools for photo and wood engravers. New York: Muller, [s.a.] (Manufacturer's catalogue)
Whittle, George Howes. "The Art of Timothy Cole" in The Art World. p. 378-383. (with marginalia)
Timothy Cole wood engraver, by Alphaeus P. Cole and Margaret Ward Cole. New York: Press of the Pioneers, Inc., 1935. (Publisher's prospectus)
Dana, John Cotton. American Art: HowIt Can Be Made to Flourish. Vermont: Elm Tree Press, 1929. (Cataloged separately and moved from collection)
Dana, John Cotton. "Mr. G.H. Whittle." T.l.s. on letterhead (The Free Public Library of Newark New Jersey, John Cotton Dana, Librarian," dated "April 18, 1906." with a brief autograph note from Dana.
Hamilton, James A. "November 28, 1998." T.l.s. to Dennis Cate, detailing provenance of the Whittle materials.
Biographical Profile of New Jersey Artist: George Howes Whittle, 1848-1921. (photocopy)
Four woodblocks with original art on surface, prepared for engraving (includes notes and writing on block backs)
19 wood engraving tools. (Note identifies Timothy cole as having given "many" of these tools to Whittle.)
Visor (Note ascribes provenance to Timothy Cole)
Five photographs, mounted on cardboard, of the interior of the Century Company offices on Union Square in New York City. Photographs date to the early twentieth century.
- Artist Tudor Jenks and editor W.F. Clarke discuss a project.
- Century employees at work in the business office.
- Editor Richard Watson Gilder works at desk while associate editor Robert Underwood Johnson gives dictation.
- Business office interior.
- Office suite interior.