Fabled Confederate ranger (1833–1916) whose guerrilla band specialized in attacking and disrupting Union supply lines. He earned the nickname “The Gray Ghost” for his clandestine and highly effective attack tactics. ALS signed “Jno. S. Mosby,” one page, 8 x 10.5, December 3, 1900. Letter to a gentleman named McGee. In part, “After reading it he will understand the immunity the cattle barons have enjoyed. The headquarters of the Paroniee Cattle Co. are in Denver. I am informed that a large part of the county is fenced in. I was going out on an investigation today but am kept in by a snow storm. I have a letter giving me a leave of 12 days to go to Washington. I doubt my going now. I want to finish up some big jobs before I go.” After the war, Mosby became an active Republican, saying it was the best way to help the South. Mosby went on to become a campaign manager in Virginia for President Grant. He subsequently served as a lawyer in San Francisco with the Southern Pacific Railroad, an employee with the Department of the Interior, first enforcing federal fencing laws in Omaha, then evicting trespassers on government-owned land in Alabama, and assistant Attorney General in the Department of Justice. In fine condition, with intersecting folds, small water spot to text, not affecting legibility, and a small pinhole of paper loss and fold intersection. Auction LOA John Reznikoff/PSA/DNA and R&R COA.