1 Letter : paper ; 20 x 12.5 cm. This letter explains that Mr. Frank J. (Francis John) Mavis served as Chief Engineer on the steamers Canadian, Mary Graff, Columbian, and King between the years 1901 and 1909. The letter recognizes Mr. Mavis as a good and efficient engineer, and that they are "very pleased to recommend him to anyone requiring his service." The letter is signed (typewritten), "Sup't Engineer,/ River Division./ H. J. Hutchinson."