Bingham was the son of Hiram Bingham (1875-1956), who had been a governor and then a U.S. senator of Connecticut. Hiram Bingham, Jr. (as he signs his name here) was the Vice Consul at the consulate. Alma Mahler had written to the consulate from Sanary-sur-mer, where she and Franz Werfel had established an exile residence following their flight from Austria in 1938, at the time of the Anschluss.
From the description of Correspondence to Alma Mahler, 1939. (University of Pennsylvania Library). WorldCat record id: 155864669