[4] After postings in Berlin, Paris, and South America, he was nominated as the American ambassador to Iran in 1939.

[3] Because of an incident involving the Iranian minister (who was caught speeding in Elkton, Maryland), and the Elkton police, along with the subsequent newspaper coverage, the Iranian government recalled their minister in early 1936.

[5] The incident caused a diplomatic rupture: all consular matters were transacted through chargés d'affaires until 1939, at which time Dreyfus was nominated.

[3] He also served as the acting Chief of the Foreign Service Inspection Corps (what later became the Inspector General of the Department of State) from 1947 to 1948,[8] before finally returning to Afghanistan as the United States ambassador from 1949 to 1951, when he was succeeded by George R.

[3][9] After he retired from the State Department in 1951, he lived in Santa Barbara, California, until his death on May 19, 1973.