printed, across bottom underneath image: Animal Locomotion. Plate. 523 / Copyright, 1887, by Eadweard Muybridge. All rights reserved; stamped in purple ink across very bottom on sheet: The Corcoran Gallery of Art, / Washington, D.C.; on verso, by unknown hand, lower left in graphite: EM0181
Mary and Dan Solomon; purchase and gift to NGA, 2006.