Intelligence Activities BibliographyDuring the Mexican War, "no move was made to establish a permanent intelligence capability . . . either in the fighting or in the peace that followed. [General Zachary] Taylor ignored intelligence almost to the point of dereliction in his invasion of northern Mexico. General Winfield Scott, who landed at Vera Cruz and occupied central Mexico, displayed better intelligence sense. He organized a crude but effective secret service known as the Mexican Spy Company under Colonel Ethan Allen Hitchcock." Ameringer, U.S. Foreign Intelligence, p. 48.
Campbell, Kenneth. "Ethan Allen Hitchcock: Intelligence Leader -- Mystic." Intelligence Quarterly 2, no. 3 (1986): 13-14.
Caruso, A. Brooke. The Mexican Spy Company: United States Covert Operations in Mexico, 1845-1848. Jefferson, NC/London: McFarland, 1991.
Croffut, W.A., ed. Fifty Years in Camp and Field: Diary of Major-General Ethan Allen Hitchcock, U.S.A. New York: Putnam's 1909.
Hefter, Joseph, and John R. Elting. "Mexican Spy Company, 1846-1848." Military Collector and Historian 21, no. 2 (1969): 48-50.
Hitchcock, Ethan Allen. Ed., Grant Foreman. A Traveller in Indian Territory: The Journal of Ethan Allen Hitchcock, Late Major-General in the United States Army. Cedar Rapids, IA: Torch, 1930.