ALS signed “Calvin E. Keach,” one page, 6.5 x 9, February 25, 1915. Handwritten letter to John Boos, in full: "I am glad to give you brief word as to my acquaintance with Abraham Lincoln. I first met him at Troy, N.Y., 1861, at R.R. Station where he made an address to public. I was at White House, after and obtained from him a pardon for man named Van Vachten Redner (for counterfeiting). I was present at Ford Theater on Friday night, Apl. 14, 1865, when John Wilkes Booth shot him. I saw Booth strike Col. Rathbone twice with a dirk knife. Was at Funeral at Albany N.Y. where body of Lincoln was viewed 25 Apl. 1865. I hereby will to you, the last photograph of Wilkes Booth, found in his trunk at his boarding-house, and which was presented to me by his brother Edwin Booth in N.Y. in 1868." Unfortunately, the photograph is no longer with the letter. In fine condition.