Piece of an envelope that stored photographs, ca. 1921. Text written on the envelope by hand: "Photos. Just before Commencement. In summer of 1921, the Gym class-1921-24-laid a curved walk stretch of conrete side walk on and about campus. These photos show the progress of this work which was approximately valued at $" On the left upper corner on the envelope is a typed address: "Association of (unknown word) Officers, Young Men's Christian Association of North America, Fortieth Conference, Springfield, Mass. June 7-11, 1918, WALTER D. DIACK, Chairman, 215 West 23rd Street, New York City"Additional writing on the envelope: " Int. Y.M.C.A. College. Concrete walks"; Part of a series of 9 items designated "Building Concrete Walkways on Campus: ...