Commencing in Clarion, and running by way of Reidsburg, Sligo, Rimersburg, and East Brady, to a point on the Allegheny River, the dividing line between Clarion and Armstrong counties; thence by way of Kaylor to a point on the dividing line between Armstrong and Butler counties, thence by way of Chicora into Butler, Butler County.
36 P.S. § 1186