Warren De La Rue, ‘LUNAR PHOTOGRAPH, EXECUTED CA. 1855’, Sotheby's

Albumen print, 5 1/2 by 4 1/4 inches, mounted on paper within an ink-ruled border.

From the Catalogue:
An early lunar photograph depicting the moon at 20 days. Warren De La Rue was a pioneering British astronomer and chemist who made great contributions to the field of astrophotography. La Rue began his photographic experiments in 1853, continuing his investigations into celestial photography throughout the 1860s, while simultaneously publishing and lecturing on the subject.
—Courtesy of Sotheby's

Ex Ewen Whitaker, lunar scientist and astronomer