Portrait of Wolman at approximately 50 years old with an inscription to Rob Roy.

Portrait of White at approximately 25 years old in naval uniform.

Portrait of Holmes at approximately 55 years old.

Portrait of Mayhew at approximately 26 years old.

Candid photograph of Marburg at approximately 83 years old, talking with an unidentified man.

Candid photograph of Holmes, sitting in a laboratory, examining the contents of a test tube with an open publication in front of him.

Candid photograph of Holmes, sitting in a laboratory, examining the contents of a test tube with an open publication in front of him.