Very few of the McLeod papers actually concern the Observatory. However, his work for the railways and in Newfoundland is documented, as are his views on the education and employment of engineers. The basic record for the early part of his career is a diary kept from 1870 to 1875, regarding student days and early work on the Observatory. An essay, "Winter under canvas" (1868) describes an early surveying job, and a letter from his father (1872) inquires about his academic progress. His work for the railways is documented by three letters of recommendation, and two letters (one from Stanford Fleming) on the work of his colleagues in the West. The Newfoundland survey (1875) is described in McLeod's diary, a manuscript essay "Across Newfoundland" (1876), his printed reports and three letters. His work at McGill is represented by six letters (largely official acknowledgements of appointments), and McLeod's manuscript notes on McGill history. McLeod's concern with the engineering profession is reflected in two addresses on education and professional development, and copies of about a dozen letters to Sir Wilfrid Laurier (1906-1908), C.A. McGrath and E.F. Wurtele (1912), largely on the employment of engineers in the civil service.

The fonds consists of Dr. Campbell's partially edited and unfinished autobiography, which he began writing in the 1960s and continued until the time of his death in 1970. The work covers the period from, approximately, 1831 to 1932. Additionally, the fonds includes the medal Dr. Campbell received for serving as Past President of the Montreal Medico Chirurgical Society, 1952-53.

Fonds contains William Wood Squire's manuscript of his thesis "Pathology and Treatment of some forms of Partial Paralysis" which won a prize as best thesis in medicine at McGill in 1864. The fonds includes a bound notebook and one loose illustration.

The fonds contains Roderick Stewart's research work and writing for his biography of Dr. Norman Bethune published as Bethune (1973) and The Mind of Norman Bethune (1977).

Fonds consists of a manuscript translation by Dr. Gruner of volume II of the Canon of Medicine of Avicenna dated 1957 and vocabulary indexes of Arabic names of Materia Medica, Latin-English names, Latin-Arabic equivalents, native names and others. These vocabularies were done in 1929-1930. It also contains three volumes of Dr. Gruner's research on cancer. This work was done through the Archibald Cancer Research Fund, from 1932 to 1946. In volume III, a printed address "A Vagabond Cruise Round Cancer" (1950) is inserted in the cover.