SIMPSON, Josiah, .surgeon, born in New Brunswick, New Jersey, 27 February, 1815; died in Baltimore, Maryland, 3 March, 1874. He was graduated at Princeton in 1833, and in medicine at the University of Pennsylvania in 1836. The following year, being made assistant surgeon, United States army, he served through the Florida war, receiving honorable mention by General Zachary Taylor for his services at the battle of Okeechobee. He was also commended by General Winfield Scott and General William J. Worth, under whom he served in the Mexican war at Vera Cruz, Cerro Gordo, Churubusco, and Chapultepee. In 1848-'55 he was attending surgeon with headquarters at New York, acting also as post-surgeon at Bedlow's island. He was then promoted surgeon and was medical director of the Department of the Pacific till 1858, of the middle department in 1862-'6, and of the Department of the Tennessee till 1867, when he was transferred to Baltimore.