Both are correct--there were two Oliver Perry Hesses:
(1) born 1879, son of Harmon J. & Sarah J. (Markle) Hess, in Fishing Creek, Columbia, PA
(2) born 1836 in Lycoming PA to Benjamin & Eliza Hess.
Oliver P (1) went on to become a surveyor and engineer in Dubois, Clearfield, PA; Oliver P (2) can be found as a Postmaster in Lycoming, PA as an adult.