The stream flows southeast under Penrose Avenue and through “Chelten House,” the estate of George Elkins on Ashbourne Road. The stream flows southeast through the neighboring estate, “Elstowe,” of William Elkins, then through the Stetson estate fronting on Old York Road, then crosses underground and is channelized behind the AJ Congregation campus and St. Paul’s church. It then continues underground through Ogontz field on Church Road where it empties into the Tookany Creek on the west side of High School Road.
Named after Tobias Leech, one of the community’s founders, and identified by that name in a 1912 newspaper article. The stream has its origin on the legacy Quaker farm of Christopher Simon which was purchased by Edward M. Davis in 1854 as part of his Chelten Hills development. The section containing the stream, designated lot 40, became part of Morris Longstreth Hallowell’s extensive estate along Chelten Avenue (Ashbourne Road)