A. Photo of armed man sitting on top of a horse, identified as Abraham Martinez. Description reads, "Abraham Martinez — Secretary to Zapata."

A. Photo of armed man sitting on top of a horse, identified as Abraham Martinez. Description reads, "Abraham Martinez — Secretary to Zapata.", Box: 1, Folder: 3. Mark Florea Upson Photographs, BENSON-MS Upson. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/491200 Accessed September 25, 2026.