This addition to the fonds consists of articles and booklets written by Frank Morris; manuscripts and published articles by Douglas Sadler; correspondence, minutes of meetings relating to Sadler's involvment in environmental and naturalist issues and activities; correspondence relating to Teacher's College and several issues of the Young Naturalist.

This addition to the fonds consists of bird spotting forms for the Ontario Breeding Bird Atlas and Ontario Breeding Bird Atlas error forms. Also included in the fonds are numerous publications and newsletters from various naturalist clubs across Ontario.

The fonds consists of three original letters. Two are written to Harriet Beaufort, the third and last one to Maria Noble. Letter #1 (November 9, 1823-December 6, 1823), tells of mail received, the death of Frances' daughter Bessie, description of produce, and of difficulties in communication with Cobourg. Letter #2 (January 27, 1824-February 5, 1824), describes Frances' troubles with servants, of Tom's trip to Cobourg over the Rice Lake/Peterborough Road, and his getting lost on the lake, and her new baby girl. Letter #3, written from Goodwood, (April 11, 1854), tells of Tom's death, and her reflections on it.

This addition to the fonds consists of an original marriage license; photocopies of an abstract of marriage settlement; last will and codicils and attachments; and miscellaneous correspondence. The correspondence includes Stewart to Browne (March 11-13, 1823) - original belongs to Mrs. G.K. Browne of St. Andrews East, Quebec; Stewart to Browne (December 23, 1853) - original belongs to Dunlop Stewart of Oakville, Ontario; and F. Stewart to Sandford Fleming - original belongs to H.T. Pammett.

This addition to the fonds consists of 10 letters (some fragments) written by Frances Stewart to her granddaughter and relatives in England, concerning her pioneer life in the Peterborough area. There is also one photograph of Harriet as young child which was photographed in London, England (biographical information is written on the back of the photograph).

This fonds consists of correspondence, an early version of the manuscript of Our Forest Home, and a copyright document for Our Forest Home. Also included are drawings, a painting, and house plans.

Fonds consists of correspondence, manuscripts, published papers and booklets, and research materials relating to the many papers, articles, and books written by Jean Murray Cole

This addition to the fonds consists of galley proofs and research notes collected prior to publication of Kawartha Heritage, 1981. The fonds also contains correspondence about the Kawartha Heritage Festival held the same year.

This fonds consists of research materials pertaining to the publication in 1978 of Ontario's Heritage: A Guide to Archival Sources.

Fonds consists of papers, articles, and manuscripts of books written by Robert Bowley. Included is research material, photographs, slides, and negatives relating to the postal history of Smith Township, Peterborough, and the surrounding area. Included also are letters dated 1823-1878 of the Baptie family who were situated in Ida, Ontario, and extensive research material related to Captain Charles Rubidge, Sir Sandford Fleming, the Pengelley/Roche families, S.J. Carver, and local historic sites. This fonds is a tremendous resource for information related to Peterborough and area in general.