found: Stereographs, stereo cards, cabinet cards and cartes-de-visite collection, ca. 1860-1920:stereograph recto (E.L. Allen, photographer, No. 6, Temple Place)
found: George Eastman House photography database, June 11, 2007(Allen, E.L; Allen, Edward L.; Allen, Edwin L.; photographer, stereo views and cartes-de-visite; American, active 1860s-1890s)
found: Ancestry.com, accessed March 13, 2024:U.S. Passport applications, 1795-1935 (Edward Lowe Allen; born Nova Scotia; photographer in Boston) U.S. Naturalization records, 1791-1992 (Edward L. Allen; born 20 Feb 1830, Nova Scotia; naturalized 8 Sep 1876)
found: Photo-era magazine, Volume 32, 1914:page 101 (Edward L. Allen, death on January 6; last surviving member of Allen & Rowell, for many years the leading photographers of Boston)
found: Union List of Artist Names in VIAF, accessed March 13, 2024(access point: Allen, Edward L., American photographer, 1830-1914)
found: Library of Congress catalog, via www, accessed March 13, 2024(access point: Allen, E. L. (Edward Lowe), 1830-1914)