518 works carry all of these threads.
Bell & Brother, active 1865 - 1875 · 1869
Unknown · 1860s–70s
Margaret "Daisy" Sutermeister, 1875 - 1950 · c. 1900
Mathew Brady Studio, active 1844 - 1894 · 1860-65
Frederick Gutekunst, 25 Sep 1831 - 27 Apr 1917 · c. 1897
The Ritz Studio · c. 1895
Meade Brothers Studio, active c. 1840 - c. 1869 · c. 1860 (after 1853 daguerreotype)
Goluth Studio, active 1930s · 1930
American Stereoscopic Co., c. 1895 - 1915 · c. 1860
Mathew Brady Studio, active 1844 - 1894 · c. 1862
Charles F. Conly, 1846 - 1892 · c. 1884
Carleton E. Watkins, 11 Nov 1829 - 23 Jun 1916 · c. 1865-66
Unidentified Artist · c. 1861-65 (after earlier photograph)
Unidentified Artist · 1863
José María Mora, c. 1847 - 18 Oct 1926 · c. 1880-85
