Epstein assisted Rabinovitch in selling his etchings in California. Postcard depicts Rabinovitch’s “Judgment of Salomon.” He writes: “Dear Herr Professor: Impatiently awaiting news from you. Have you received my things and where and when will they be exhibited? Do you think there will be a financial success?” (Translation by Elena Rudnev.) Paul Epstein Papers.
In 1930 Millikan invited Albert Einstein to be a distinguished visiting professor at Caltech. Einstein arrived in time for the formal opening of the Athenaeum in January 1931. Paul Epstein Papers.