Isidor
Isidor A. Popper, an early 20th century
immigrant to New York City and an entrepreneur, signed the above affidavit in
1938, sponsoring the immigration of Vienese refugees Alice and Gisele Popper
(even though they were not actually her relatives). Popper signed 32 such
documents, which were most successful when promoted by a family member. Here, you can
see…