Walsh's private papers are rather formal in nature, consisting largely of certificates of membership in various professional societies and social clubs, awards and medals, official papers such as his commission in the Canadian Army Dental Corps (1940), honorary degrees and the citation upon his appointment as Emeritus Professor (1955). The photographs fall into three classes: those from his student days, both informal snapshots and formal portraits with the Students' Council or sports teams; formal portraits of Walsh alone or in professional groups; and informal photographs with golfing friends.