Portrait of Eckenrode at 29 years old.

Portrait of DeVries at approximately 40 years old.

Portrait of Clarke at approximately 54 years old.

Portrait of Chitwood at approximately 28 years old.

Outdoor candid photograph of Cushing at approximately 36 years old with his hat and cane.

Candid photograph of Sowers at approximately 31 years old sitting on steps.

Candid photograph of McCrae at approximately 36 years old at a patient's bedside.

Candid photograph of Kelly at approximately 50 years old at Hopkins Hospital.

Candid photograph of Howard at approximately 30 years old with a microscope.

Candid photograph of Hamman at approximately 32 years old.