Browse Items (2 total) Spatial Coverage is exactly "Thornbury (Delaware County, Pa. : Township)" Browse All Search Items Browse Map Browse by Headings Sort by: TitleCreatorDateDate Added Items open in a separate tab. Close the tab to return to this list. 525. Open. East of 202, on Dilworthtown Rd., looking east, Thornbury Township Location: Thornbury (Delaware County, Pa. : Township) Date: 1955-08 Exact location uncertain. 528. Detached, new. Near Thornton Location: Thornbury (Delaware County, Pa. : Township) Date: 1955-08 Exact location uncertain.