View of excavation for foundation of Main Library, Detroit Public Library. Wooden fence borders south bank of foundation; two construction workers stand in trench. Printed on front: "No. 116. Taken Mch-22-15. Detroit Public Library bldg. South bank. Cass Gilbert, architect. Irwin & Leighton, builders." Stamped on back: "Charles Ruel Messinger, commercial photographer, 1646 Woodward Ave., Detroit, Mich., phone Hemlock 2186, phone North 6298."