 It then entered Chester County and went through Elverson and Warwick to French Creek, which it followed to Bucktown and finally Phoenixville (on the Schuylkill River).Pennsylvania Route 999 follows the course of this path to Lancaster, and Pennsylvania Route 23 continues from there to Phoenixville.As much of this path follows the Conestoga River and French Creek, it is possible it paralleled a canoe path with a portage between these two streams.