Photograph of painting of William Bullock Clark at approximately 55 years of age.

Photograph of painting of Mary Washington Keyser Thom at approximately 45 years of age. Photograph of a painting used for reference by the artists who painted the Shriver Hall murals.

Photograph of painting of Mary Washington Keyser Thom at approximately 45 years of age. Photograph of a painting used for reference by the artists who painted the Shriver Hall murals.

Photograph of painting of John Jacob Abel at approximately 60 years of age. Photograph of a painting used for reference by the artists who painted the Shriver Hall murals.

Photograph of painting of Harmon Northrup Morse at approximately 70 years of age.

Photograph of painting of Harmon Northrup Morse at approximately 70 years of age.

Photograph of painting of Harmon Northrup Morse at approximately 70 years of age.

Photograph of painting of Harmon Northrup Morse at approximately 70 years of age.

Photograph of painting of William Sydney Thayer at approximately 55 years of age. Photograph of a painting used for reference by the artists who painted the Shriver Hall murals.