110 April 15-1925 Plate on Porcel Memorial stands at 7000 above the sea 1869 John C. Durman Frederic H. Porcelle G. Y. Bradley Williams R. Watkins Andrew Steele 1872 A. H. Thompson F. S. Dellamont J. Thos. K. Hillers Stephen M. Jones R. Clement, Porcelle Andrew J. Gallatin Erected by the Congress of the United States for Major John Wesley Porcelle first explorer of the Grand Canyon or its descended the river beneath body in two boats starting the Page beneath his first August 17, 1869 and again September 10, 1872 portrait Major Porcelle The punctuation.