The fonds contains primary source material pertaining to Matrix magazine (published in Lennoxville, QC from 1974 to 1988). The material in the fonds spans from 1913 to 1921, and from 1974 to 1995. It consists of correspondence, largely with Matrix editor Philip Lanthier, regarding the administration and content of the magazine. The fonds also consists of prints of work submitted to the magazine, 53 photographs (including 12 35mm negatives) from The Seventh Moon poetry readings, featuring Irving Layton, Lucien Francoeur, and Ralph Gustafson, as well as 55 miscellaneous photographs (including 18 35mm negatives). Other items found in the fonds include an award certificate for Joyce Marshall in Matrix (1984), transparencies of artworks, sketches for the magazine, a Seventh Moon Poetry Reading poster, and press clippings. The fonds is comprised of the following series: Correspondence ([1974-1991?]), Administration (1974-1988), Promotional Material ([1974-after 1985?]), Special Events ([1980?]-1995), Design Process ([1913-1921], [1974-1995?]).
