Portrait of George Louis Wolff (Gerd Ludwig Wolff) holding a mouse in his genetics laboratory; Little Rock, Arkansas.

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Franz Matthiesen outdoors with his second wife Katherina Früh outside of Franz's Carton Hill home; London.

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Ruth Weiss nee Stern with Annette, Meir, and David Weiss at Mortimer Hill Farm; Mortimer, England.

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Portrait of George Louis Wolff (Gerd Ludwig Wolff) holding a mouse in his genetics laboratory; Little Rock, Arkansas.

Digital Image

Ruth Weiss nee Stern with Annette, Meir, and David Weiss at Mortimer Hill Farm; Mortimer, England..

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Portrait of George Louis Wolff (Gerd Ludwig Wolff) holding a mouse in his genetics laboratory; Little Rock, Arkansas.

Digital Image

Franz Matthiesen outdoors with his second wife Katherina Früh outside of Franz's Carton Hill home; London.

Digital Image

Ruth Weiss nee Stern with Annette, Meir, and David Weiss at Mortimer Hill Farm; Mortimer, England.

Digital Image

Ruth Weiss nee Stern with Annette, Meir, and David Weiss at Mortimer Hill Farm; Mortimer, England..

Digital Image