523 works carry all of these threads.
Hill and Adamson · 1843–47
Allen & Rowell Studio, active 1874 - 1893? · c. 1870
Southworth and Hawes · ca. 1850
Meade Brothers Studio, active c. 1840 - c. 1869 · c. 1860 (after 1853 daguerreotype)
Mathew Brady Studio, active 1844 - 1894 · c. 1864
Unidentified Artist · c. 1861-62
José María Mora, c. 1847 - 18 Oct 1926 · c. 1880-85
Unidentified Artist · c. 1861-65 (after earlier photograph)
Unidentified Artist · 1861
Frederick Gutekunst, 25 Sep 1831 - 27 Apr 1917 · c. 1865
Unidentified Artist · c. 1870
Unidentified Artist · c. 1860
Mathew Brady Studio, active 1844 - 1894 · July 1863
Mathew B. Brady, 1823? - 15 Jan 1896 · c. 1858
Mathew Brady Studio, active 1844 - 1894 · c. 1861
B. W. Kilburn, active c. 1891 · 1891
![[Boston Doctors]](https://images.metmuseum.org/CRDImages/ph/web-large/DT300224.jpg)