Portrait of Singewald at approximately 56 years old.

Portrait of Singewald at approximately 56 years old.

Portrait of Singewald at approximately 55 years old.

Portrait of Secrist at approximately 45 years old.

Portrait of Scharf at approximately 48 years old.

Portrait of Sayre at approximately 70 years old.

Portrait of Salinas at approximately 45 years old.

Portrait of Roulston at approximately 60 years old.

Portrait of Roulston at approximately 60 years old at desk with typewriter.

Portrait of Rosenblatt at approximately 40 years old.