- Envoy Extraordinary and Minister Plenipotentiary (Costa Rica)
Appointed: June 21, 1913
Presentation of Credentials: August 29, 1913
- Stewart Johnson was serving as Chargé d'Affaires ad interim when Legation San Jose was closed, Dec 5, 1918. The Legation was reopened Oct 15, 1920 with John F. Martin, Jr., as Chargé d'Affaires ad interim. Walter C. Thurston served in that capacity, Jan. 1921-Mar. 1922.