1To Thomas Jefferson from Richard Randolph, 10 January 1809 (Jefferson Papers)
When at Monticello in September last, on looking over some military books; in a work of Marshal Saxe’s, he suggests the idea of a bridle for the use of Cavalry, which he thought might be formed so as to command a horse, without having any thing in the mouth. The very great advantages which wou’d be derived from such a contrivance, made so strong an impression upon my mind, that I determined to...