Fourth Sergeant Newton J. Earp, Marion Co. Enl. Nov. 11, 1861; prom. 8th Corp. Sep. 1, 1863; 7th Corp., date not reported. Reenl. Vet. Dec. 12, 1863, and reapp. 7th Corp.; prom. 6th Corp. Jan. 1, 1864; 4th Corp. May 1, 1864; 6th Serg. July 1, 1864; 4th Serg. Jan. 1, 1865. Mustered out June 26, 1865, Louisville, Ky., under G. O. 27 of 1865, Dep. of Ky., and telegram from Paymaster Gen.'s office dated June 9, 1865, as convalescent in hospital.
SOURCE: William Forse Scott, Roster of the Fourth Iowa Cavalry Veteran Volunteers, 1861-1865, p. 105