TLS signed “R. J. Gatling, Prest.,” one page, 5.5 x 8.5, Office of the Gatling Gun Company letterhead, March 10, 1886. Letter to the Colt Firearm Company. In full, “Please send, as soon as possible, to the Union Metallic Cartridge Company, Bridgeport, Conn., a chamber gauge or template, for the .75-cal Gatling Gun, advising us when you have done so.” In very good condition, with mailing folds, some minor spreading to signature, a square of light soiling to upper left, and a soiled crease to upper right, and a pencil notation in another hand at bottom: “Will forward to the U.M.C. Co. this pm 2 cartridges gauges with two 75/c cartridges.” COA John Reznikoff/PSA/DNA and R&R COA.