Happened across your post after doing a Google search for Gasper Tarr Durr. I am a great-grandson of Mary Tarr Fry (1845 - 1897), a daughter of Gasper C. Tarr and Ann Taylor. She is buried in Mt. Lebanon Cemetery in Tarr, but it's in Westmoreland County, not Venango County, on PA 31 between Mt. Pleasant and Ruffsdale. There could very well be another Tarrs Station in Venango County, but all the details I've encountered about the Tarrs placed Tarrs Station in Westmoreland County, at the location I mentioned.