Sapieha, Prince John
Banker. Owner of large silver and gold mines in California; married into the Astor family and founded a bank in New York, N. Y. Friend of Prince Ladislaus Poniatowski, he lived in San Francisco, Cal., about 1876-1880.From: "Who's Who in Polish America" by Rev. Francis Bolek, Editor-in-Chief; Harbinger House, New York, 1943