Reference: Alabama Department of Archives & History. Custodian of the original pictures. Confederate Officers photo album. http://www.archives.alabama.gov/conoffalb/index.html
Daniel Marsh Frost was born in Schenectady County, New York, August 9, 1823, and was graduated from West Point in the class of 1844. After winning a brevet for gallantry at Cerro Gordo during the war with Mexico, he resigned from the army in 1853 and engaged in manufacturing in St. Louis. He also served in the state senate, on the Board of Visitors to the U. S. Military Academy, and was active in the Missouri militia, being a brigadier general in that body in 1861. As such, he surrendered Camp Jackson at St. Louis to the Federal General Lyon and was paroled. After his exchange he was appointed brigadier in the Confederate Army from March 3, 1862, and was offered command of a brigade of Missouri state troops at the battle of Elkhorn, but "declined so small a command, and watched the battle from a convenient height." Frost served for a few weeks as General Bragg's inspector general and subsequently under General Hindman in Arkansas, being present at the battle of Prairie Grove. In the fall of 1863 his wife's banishment from their home near St. Louis and the resultant suffering to his family caused him to leave the army and go to Canada, apparently without going through the formality of submitting his resignation to the War Department. He was, in any event, dropped from the army rolls on December 9, 1863. After the war he returned to his home in St. Louis County, where he engaged in agricultural pursuits until his death, October 29, 1900. He is buried in Calvary Cemetery, St. Louis.
Ref: Generals in Gray, Lives of the Confederate Commanders by Ezra J. Warner. Printed by Louisiana State University Press, Baton Rouge and London.