David Edward Cronin, also known by his pseudonym Seth Eyland,[1] (July 12, 1839 – June 9, 1925) was an American painter, illustrator and journalist.

[3] During the American Civil War Cronin was a Union officer and Provost Marshal of Williamsburg.

[5] He served as an officer of the New York Black Horse Cavalry for some time and wrote a "graphic story of the night his command waited transportation southward and slept on the platforms and the Market street pavement".

One notable commission was to illustrate a two-volume book on the "Personal Memoirs of U.S. Grant" with 255 original pen-and-ink and watercolor sketches.

[2] Cronin's paintings include An Old Picture Gallery (1878), The Evolution of a Life (1884),[10] and Fugitive Slaves in the Dismal Swamp, Virginia (1888).