Subject: Inner canyon scene showing the Lower Algonkian Formation by Gunnar Widforss. Signed "Widforss/Grand Canyon 1929" in lower left corner. Also written in the lower right corner in "To the Academy of Sciences/From Lincoln Ellsworth/Because of his interest in the rocks (Lower Algonkian) that contain fossils of the first life to leave distinct record."

Date: 1929.

Medium: Watercolor on watercolor board.

Collection: Grand Canyon National Park (No. 13631).