These records consist of a ledger, 1877-1884, of an unidentified grist mill in the Eastern Townships.

The official records of the Montreal Ladies' Educational Association comprise minutes of the General and Executive Committees, 1871-1885; an account book, 1871-1885; a fee register, 1880-1885; a list of students of the M.L.E.A. and after 1885 of McGill, 1881-1890; a register of certificates granted, including comments on the student's performance, 1871-1885; and printed prospecti and annual reports. A 'Register of Teachers', 1871-1881, contains advertisements for school teachers and governesses.

The fonds reflects the scientific and literary outreach activities of the Montreal Natural History Society over the course of its existence and contains correspondence, minutes, financial records, council and committee reports, membership lists, donation lists, catalogues of holdings, newspaper clippings, lecture advertisements and weather maps. In addition, the fonds includes reference material to other societies and information regarding the publication and creation of the Canadian Naturalist and Quarterly Journal of Science, Canadian Naturalist and Geologist and the Canadian Record of Science.

The fonds is composed of the following series: 1) Accounting Records (1860-1917); 2) Administrative Records (1833-1887); 3) Catalogues (ca.1829-ca.1925); 4) Correspondence (1871-1896 with gaps); 5) Essays and Lectures (1829-1852); 6) Minutes (1827-1832,1844-1923); 7) Montreal Microscopical Society (1884-1906); 8) Reports (1828-1881 with gaps); 9) Weather Maps (1895-1897).

Fonds contains the records of the Osler Reporting Society of Montreal from 1929 to 1972, including record books, correspondence, invoices, receipts, list of members, minutes, and constitution.

Included is the constitution, by-laws, and minute books covering 1922-1940. Approximately one half of this material consists of membership cards recording the name, rank, degrees, and publications of members from 1920 until ca 1970. There are also membership lists for various periods including the founding members and lecture lists, ca 1930s. The secretary's files, covering the period 1963-1969, contain files on dues collected, expenditures, membership (nominations, transfers, correspondence with members), the national convention, and chapter meetings. Financial transactions from 1939 to 1946 are recorded in the treasurer's account book.

This archive consists of photocopies of the portion of the ledger of William Lauder, concerning the Arts Building project, 1838-1841. An index to the entire ledger is included.