Before revision: William Penn's plan for a second settlement in Pennsylvania The idea of uniting the Schuylkill and Susquehanna rivers by a canal was first proposed and discussed by William Penn in 1690.Engineering Record, Building Record and Sanitary Engineer, Volume 40, Charles Frederick Wingate, McGraw Publishing Company, 1899 Accessed at Google books on July 30, 2016Bishop, Avard Longley.
After revision: The idea of uniting the Schuylkill and Susquehanna rivers by a canal was first proposed and discussed by William Penn in 1690.Engineering Record, Building Record and Sanitary Engineer, Volume 40, Charles Frederick Wingate, McGraw Publishing Company, 1899 Accessed at Google books on July 30, 2016Bishop, Avard Longley.