Portrait of Williamson at approximately 50 years old in the entrance hall of the U.S. Embassy in Rome.

Candid photograph of Edelstein at approximately 54 years old having tea with his wife and a guest in his Oxford apartment.

Candid photograph of Edelstein at approximately 54 years old having tea with his wife and a guest in his Oxford apartment.

Candid photograph of Edelstein at approximately 54 years old reading in his Oxford apartment.

Candid photograph of Edelstein at approximately 54 years old talking with an unidentified man.

Candid photograph of Hopkins at approximately 40 years old, working on the Johns Hopkins University Mace.

Candid photograph of Von Gienanth at approximately 45 years old with his wife and daughter at their home in Eisenberg, Germany.

Candid photograph of Von Gienanth at approximately 45 years old in a factory.

Candid photograph of Von Gienanth at approximately 45 years old in a factory.

Portrait of Von Gienanth at approximately 45 years old with his hand on a book.