From Kate Ogden, The Richard Stockton College of New Jersey:
John Alexander McDougall (1811 - 1894 )
John Alexander McDougall was a native of Livingston, New Jersey, but spent most of his career in Newark. His birth date has been reported as 1810 or 1811. By 1838 he had a working partnership in Newark with George Ross: McDougall specialized in miniatures – small portraits about 2-3 inches in size – while Ross painted large oil portraits. The Metropolitan Museum of Art has McDougall’s portrait of Henry Clay, a watercolor miniature on ivory. Although he lived and worked in Newark, McDougall also maintained a studio in New York City. Several of his children followed their father into careers in the arts.
McDougall began his career as a miniaturist but was later employed as a photographer; he may also have practiced lithography. In addition to portrait miniatures, the artist painted landscapes and large-scale portraits, several of which are now owned by The Newark Museum.
William H. Gerdts, Painting and Sculpture in New Jersey (Princeton, NJ: Van Nostrand, 1964), pp.46-47.
Hildreth York and Mary R. Murrin, The Arts and Entertainment in New Jersey (Trenton: New Jersey Historical Commission, Department of State, 1996), p.19.
Metropolitan Museum of Art website.