Summer library school, 1919

W.W. Bishop, front row

Summer library school, 1921

W.W. Bishop, back row

Walter Koeltz & Rup Chang at Waterloo, MI, Summer 1956 (horizontal)

By H.H.B." [Harley H. Bartlett?

Walter Koeltz & Rup Chang at Waterloo, MI, Summer 1956 (vertical)

This negative seems taken at same time as similar print inscribed per title / description - perhaps taken by H.H.B. [Harley H. Bartlett?]