LEE, Robert E. (1807-1870). Autograph letter signed ("RE Lee"), to Major [Richard Delafield]. Washington, D.C., 31 August 1846. 2 pages, 4to, written on recto and verso, docketed by recipient on lower portion of verso, some minor spotting, creased; matted and framed. Written while en route from Fort Hamilton in New York to San Antonio to join General Wool's Army in the Mexican War. ".... I am very much obliged to you for your interest in my horses. You must do with them what you think best. At this distance, I can say nothing, but sell the whole concern & place the amount to my credit in the Bank of Commerce ... I am detained here today or aft if the arrangements for money, but shall be off tomorrow, by the Charleston route ... it is the intention of Govt: to put up a Fortress at San Antonio against the Moschitoes, which are so large that they stand on the ground & drink out of a pint cup-I do not know whether I am to be the Engineer" In a postscript he adds: "Tell Mr. Rider that the Saddle bags had not arrived this morning & I shall have to go without them."