aaw_002 December 20, 2018February 5, 2019 Matthew Caulkins, Web Applications Program Manager Previous Next M-2. Ulmus americana Massachusetts. Side of main road between Groton and Townsend. Girth of trunk 15 ft. Photograph by E.H. Wilson, October 12, 1923. All photographs by Ernest Henry Wilson. Copyright © President and Fellows of Harvard College, Arnold Arboretum Archives; all rights reserved.