Appears to be a 19th century photo copy of a painting dating approx. 1810, based on cravat bow and collar style. Based on brushing marks at lower margin probably ca. 1870. Albumen print; 2 1/8" x 2 1/2."
Note: by Vincent Ponko, J. 19th century science in New Mexico: The 1882 transit of Venus observations at Cerro Roblero. Journal of the West. October 1994. Includes correspondence between J. F. Monk and Dr. Marjorie Ciarlante.
