Massachusetts-born Francis Winslow started his navy career as a midshipman in 1833 at age 15. He served aboard the brig Washington during the war with Mexico. During the Civil War he commanded two gunboats in the Gulf Blockading Squadron, the Water Witch and the R.R. Cuyler. On the latter ship he fell ill with yellow fever and succumbed to its effects on August 26, 1862, outside Key West, Fla. He is buried in New Hampshire.
Winslow sat for this portrait in the studio of J.W. Black of Boston in 1861 or 1862.