MYLES W. KEOGH (1842-1876) American military officer, a captain in the 7th Cavalry in command of Co. I. Keogh was the owner of Comanche, the only surviving horse found on the battlefield. Rare signature "Keogh" accomplished on the face of an envelope addressed to his brother: "T. Keogh Esqr. Park House Carlow Ireland". Marginal losses, some soiling, stamp removed, yet signature remains very good. $400-600