View of excavation for foundation of Main Library, Detroit Public Library. Sluice and tower on right; steam shovels and horse-drawn wagons in background. Printed on front: "No. 113. Taken Mch-15-15. Detroit Public Library bldg. Southeast. 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."