Fonds contains G.E. Tremble's notes on the anatomy of the ear from lectures by Professor Ruttin at the University of Edinburgh in 1924, a letter from Dr. Wilder Penfield and a photograph of a case of 1935. The fonds includes a notebook, a letter and a photograph.

These papers almost exclusively consist of records of his research and publications. His publications files contain drafts of various scientific papers, largely on secretions, correspondence regarding the reception of Die Aussere Sekretion der Verdauungsdrusen (1928) and negotiations surronding the publication of the Pavlov biography, and a biographical file containing a curriculum vitae, bibliography, and correspondence concerning appointments, honorary degrees, (1923-1948). Research materials comprise six volumes of reports on laboratory experiments and a file of daily laboratory reports (1923-1943). Babkin's professional correspondence with scholars and scientific associations covers the years 1928 to 1943. Most of the letters, incoming and drafts of outoing, concern research problems, consultation on draft articles by colleagues, and Babkin's own publications. There are also negotiations for speaking engagements, and a scattering of items on Babkin's social involvements, e.g. relief for Russian refugees, and letters from students.

Most of this collection consists of the selected incoming personal correspondence of Caroline H. Pelton, 1846-1873, and some correspondence of members of her family, 1842-1905. Also included are two diplomas awarded to Caroline Pelton from the McGill Normal School, 1860 and 1861 and family photographs. There are also selected financial records of St. George's Church, Montréal, 1882-1885.