(1826-1874) Active as a daguerreian in Springfield, Mass., in 1851, and then in Brooklyn, N.Y., 1853-1860.
According to a report published at the time of his death, he learned the daguerreian process in Springfield, and was listed in business there in 1851, at the corner of Main and Sanford Streets. In 1853-1854 he was listed as a "practical daguerreotypist" at 249 Fulton Street, and boarded at the Globe Hotel at 244 Fulton Street.
In 1854-1855 he advertised daguerreotypes by electricity at the same address, and lived at 287 State Street. He also advertised cameo daguerreotypes. In 1855-1856 he advertised photographs and stereoscopes as well as daguerreotypes at the 249 Fulton Street address.
From 1857 to 1860 the firm was noted as Williamson Brothers, and included E.M. Williamson. The firm remained at 249 Fulton Street. Images identified as being by C.A. Williamson exist. He reportedly worked previously for M.A. Root. He introduced the "Cameotype." In 1864 he employed 40 people. In 1860 he may have employed J.B. Wanderforde.
The Brooklyn Union wrote of him on October 23, 1874: "By the death of Charles H. Williamson the photographer of this city and, indeed, of the United States, have lost one of their most able associates in the profession. Mr. Williamson, after a somewhat severe illness of about ten days, passed away yesterday. The immediate cause of his death was congestion of the brain. Deceased learned the profession of photography at Springfield, Mass. Subsequently, in 1851, he came to Brooklyn, and opened a gallery adjoining the one he occupied at the time of his death. He was one of the arliest picture-takers in Brooklyn, when they were produced by what was then known as the daguerreotype system. Since then many improvements have been made in the art, and Mr. Williamson was not slow to take advantage of them. He was an excellent painter in water-colors, and many of the finest miniatures in his studio were finished by him. Several new styles of pictures originated with him, notably the cameo style. He introduced a system of teaching drawing from the transparent positive which has been found of great advantage to beginners in drawing. A few days before he was taken sick he was engaged in an invention for graying the background of pictures. He was an original member of the Brooklyn Photographic Art Association, and at its meetings read several papers on subjects relating to the profession." Williamson was married and had two children.