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 53 years old in Queen's College Library, Oxford University.

Candid photograph of Edelstein at approximately 53 years old in Queen's College Library, Oxford University.

Candid photograph of Edelstein at approximately 53 years old in Queen's College Library, Oxford University.

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 39 years old, working on the Johns Hopkins University Mace.

Candid photograph of Hopkins at approximately 39 years old, working on the Johns Hopkins University Mace.