502 works carry all of these threads.
Unidentified Artist · c. 1861-65 (after earlier photograph)
S. Mordan & Co., England · 1848–49
William Cocknidge · 1577–78
E. & H. T. Anthony & Company, active 1852 - 1901 · c. 1862 (after c. 1946 photograph)
Barr & Young, active 1860s · c. 1862
Unidentified Artist · after 1870
Mathew B. Brady, 1823? - 15 Jan 1896 · 1869
Unidentified Artist · c. 1868
Unidentified Artist · c. 1865
Unidentified Artist · c. 1872
Carleton E. Watkins, 11 Nov 1829 - 23 Jun 1916 · c. 1870
José María Mora, c. 1847 - 18 Oct 1926 · c. 1880-85
Kempen & Zoon, J.M. van (mentioned on object) · 1865
Meade Brothers Studio, active c. 1840 - c. 1869 · c. 1853
Frederick Gutekunst, 25 Sep 1831 - 27 Apr 1917 · c. 1875
Mathew Brady Studio, active 1844 - 1894 · c. 1860
