‘Register of Aliens & Persons Having Conscientious Scruples Against Bearing Arms, 1862, Records of State and District Offices, 1861-72, Western Division; Records of the Provost Marshal General’s Bureau, Record Group 110; National Archives Building, Washington, DC.
My understanding is he may have just paid a fee and didn't have a substitute.Which if you thought around 1862 he might of registered as a C.O.. Patriotism was at it's high point there was much pressure to sign up.