English: Geological field excursion to Harpers Ferry, West Virginia , April 30, 1897, following the George Huntington Williams Memorial Lectures delivered by Sir Archibald Geikie at Johns Hopkins University . The photograph was taken by Joseph S. Diller at Jefferson Rock , above Harper’s Ferry. Individuals in photo include (starting at top): Cleophas Cisney O'Hara, Sir Archibald Geikie , Frederick Haynes Newell , Henry Barnard Kümmel , George Burbank Shattuck, Rollin D. Salisbury , Arthur Clifford Veatch, Louis Marcus Prindle, Harry Fielding Reid , Charles R. Van Hise , Cleveland Abbe, Jr. , George Willis Stose, Thomas Leonard Watson, Edward Vincent D'Invilliers, Clarence Wilbur Dorsey, Frederick James Hamilton Merrill , Louis Agricola Bauer , Arthur Coe Spencer, William John McGee , William Bullock Clark , Rufus Mather Bagg, Frank Hall Knowlton , Robert T. Hill , Heinrich Ries , Frank Dawson Adams , Arthur Philemon Coleman , Timothy William Stanton, Oliver Lanard Fassig , Samuel Franklin Emmons , George Ferdinand Becker , Albert Berthold Hoen, George Otis Smith , James Furman Kemp , Bailey Willis , Charles David White , Edward Bennett Mathews, Charles Doolittle Walcott , John Wesley Powell , Joseph Stanley-Brown, Joseph Austin Holmes , Charles Willard Hayes, Leonidas Chalmers Glenn, Hiram Smith Williams .