mckelvey_01 January 31, 2019January 31, 2019 Matthew Caulkins, Web Applications Program Manager Previous Next Views from San Francisco Mt. Boulevard, Flagstaff, Ar., about 10,000 ft., trees in foreground mostly Pinus aristata (Engelm.) S.D. Mckelvey, 1929. Photographs by Susan Delano McKelvey (1883-1964). Copyright © 2015, President and Fellows of Harvard College, Arnold Arboretum Archives; all rights reserved.