Portrait of Hagan at approximately 41 years old.

Portrait of Rentschler at approximately 34 years old.

Portrait of Reid at approximately 45 years old.

Portrait of Reese at approximately 45 years old in laboratory.

Portrait of Reddick at approximately 32 years old with his signature.

Portrait of Reddick at approximately 32 years old with his signature.

Portrait of Pupin at approximately 54 years old in academic robes.

Portrait of Peppler at approximately 45 years old.

Portrait of Palmer at approximately 58 years old.

Portrait of Mustard at approximately 51 years old.