Data sources
The primary archival sources are composed of KSCO's business records contained in the Calvin Company records at Queen's University Archives, Kingston, Ontario. The catalogue of The Calvin Company Papers lists 256 bound volumes and 136 boxes, which include records of the firm's diverse operations, family and personal legal matters. The Calvin Collection, archived at the Marine Museum of the Great Lakes, Kingston, Ontario, contains nine boxes of chronologically ordered records of a personal and business nature, and a large number of bound volumes of company and personal records. The Marine Museum archives contain some additional records of Kingston Shipping Company Limited, eliminating gaps within the Queen's University collection.