Hope this helps some descendents:
Census: 1870 living in Columbia Twp with wife Josephine. Postmaster
John H. Sterrett was in the 3rd Indiana Cavalry, captured at Mine Run, survived Andersonville Prison.
Census: 1860 Living with William and Elizabeth Lockard. Working as Blacksmith probably for Daniel Darby. Columbia Twp
Census: 1850 Living with William and Elizabeth Lockard in Orange Twp, Fayette co. Indiana. Age 11
Note: William and Elizabeth are 38 and 37. They dont have kids until they are in forties. John may be the son of Elizabeth.
NO John Sterrett on 1840 census but there is a Thomas Sterrett living in Henry co which is close to Orange twp.

Sterrett was misspelled each time: Storrett, Sterret, Steret, and my personal favorite Sloret.