520 works carry all of these threads.
Unidentified Artist · c. 1870
Mathew B. Brady, 1823? - 15 Jan 1896 · 1871
Unidentified Artist · c. 1855
Unidentified Artist · c. 1865
José María Mora, c. 1847 - 18 Oct 1926 · c. 1880-85
Unidentified Artist · c. 1861-65 (after earlier photograph)
Napoleon Sarony, 9 Mar 1821 - 9 Nov 1896 · c. 1875
Frances Benjamin Johnston, 15 Jan 1864 - 16 May 1952 · 1900
Bell & Brother, active 1865 - 1875 · c. 1860
Harry Warnecke, 1900 - 1984 · 1945
Unidentified Artist · after 1870
Mathew Brady Studio, active 1844 - 1894 · 1863
John Carbutt, 2 Dec 1832 - 28 Jul 1905 · c. 1865
E. & H. T. Anthony & Company, active 1852 - 1901 · c. 1861