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.