Robert Granville Caldwell (1882–1976)

Non-career appointee
State of Residence: Texas
  1. Envoy Extraordinary and Minister Plenipotentiary (Portugal)
    Appointed: June 13, 1933
    Presentation of Credentials: August 21, 1933
    Termination of Mission: Left post on May 28, 1937
  2. Envoy Extraordinary and Minister Plenipotentiary (Bolivia)
    Appointed: May 4, 1937
    Presentation of Credentials: August 21, 1937
    Termination of Mission: Left post on June 23, 1939