Three glass orotones in single wood & gesso frame. The central photograph measures 10¾x13¾, the two flanking photographs each 10¾x6¾; overall 13½x10¾.

Spectacular glass orotone by A.C. Pillsbury, who operating a studio in Yosemite from 1907-1927, specializing in glass orotones. Though not signed, the triptych is undoubtedly his work. The central photograph shows the Merced River, with Half-Dome at the right, the stone bridge at center; the left-hand panel is of Mirror Lake with the precipices reflected; the right-hand panel is a striking view of the massive El Capitan.