"History of Delaware County, Pennsylvania, from the Discovery of the Territory Included within its Limits to the Present Time, with a Notice of the Geology of the County, and Catalogues of its Minerals, Plants, Quadrupeds, and Birds, Written Under the Direction and Appointment of the Delware County Institute of Science" published in 1862, by George Smith, M.D.
This book can also be found by searching WebPAC, the Widener University Library Catalog.