Fonds is comprised of three bound volumes of correspondence, sketches, paintings, diaries, receipts, newspaper clippings, deeds, baptismal and marriage records, family trees, and scrapbooks pertaining to the Wallis family. Included also are several documents pertaining to the Forbes family, related to the Wallis family through marriage. The Peterborough-born sculptress Katherine E. Wallis (1860-1957), whose papers are located in Trent University Archives, was a member of the Wallis family.
The volume spines are inscribed as follows:
- Papers of Louisa Charles John Mary and Adah Wallis 1854-1882 (Vol. I);
- Papers of Louisa Charles John Mary and Adah Wallis 1883-1895 (Vol. II);
- Captain R.M. Forbes, R.N. 1774-1846 and Family.