This fonds is comprised of files, loose documents and photographs kept by Aubin Edmond Arsenault and his family. The fonds consists mainly of subject files containing memos, correspondence, and reports written by Arsenault relating to tourism, PEI Native People, and a variety of historical topics. A number of subject files contain material of a biographical nature including photographs of Arsenault as a young man and in a number of professional capacities. The fonds also contains drafts and a published copy of his memoirs as well as two scrapbooks of newspaper clippings of Legislative Assembly debates from April-May 1919.

The original file composition and file names given by A. E. Arsenault or his family were retained. Published material already held by the Prince Edward Island Public Archives and Records Office and material not directly related to A. E. Arsenault or Prince Edward Island was removed.

The majority of the fonds consists of records pertaining to John Mathieson's political career from 1903 to 1943. The collection also contains some of Mathieson's personal papers, as well as a miscellaneous document concerning the estate of Lady Wood, one of Governor Fanning's daughters.