First tour of Conestoga River Valley - from left - front row (sitting) William H. Kreitz, J. Arthur Morris, Harry F. Stacks, Benjamin M. Landis, Donovan Smith. Standing - Raymond Weaver, Earl F. Rebman, Carl P. Lefever, Dr. H. M. J. Klein, Dr. Herbert H. Beck, William J. Poorbaugh, John J. Eshelman, Robert M. Binkele, Stanley Musselman, Amos H. Funk.
From page 20 of Earl Rebman's "Conestoga River Watershed - Outline of History, 1710 - 1973"