Ruth, I found a Cyrus Sproul who was discharged from the 85th Pa. Infantry on surgical certificate, April 11, 1863 and died April 14, 1863. Company E was muster in Nov.12, 1861 and muster out Nov.22, 1864. I don't know if he was related even though the name is spelled differently. Crumrine, Boyd. "History of Washington County, Pennsylvania". Note: I don't have the date for this book, but it is available on line. Rosalie