James Grant Wilson and John Fiske, eds., “Parsons, Mosby Monroe,” Appleton’s Cyclopaedia of American Biography (New York: D. Appleton and Company, 1900), 4: 664.
PARSONS, Mosby Monroe, soldier, b. in Virginia in 1819 ; d. in Camargo, Mexico, 17 Aug., 1865. He removed to Cole county, Mo., early in life, practiced law, was attorney-general of Missouri in 1853—'7, and subsequently became a member of the state senate. He was a captain in the U. S. army during the Mexican war, and received honorable mention for his service at Sacramento. At the beginning of the civil war he acted in concert with Gov. Claiborne F. Jackson in his endeavor to draw Missouri into the Confederacy, was active in organizing the state militia, and raised a mounted brigade which he commanded at Carthage, Springfield, and Pea Ridge, with the rank of brigadier-general, subsequently serving under Gen. Sterling Price until the last invasion of Missouri in 1864. The next year he went, to Mexico, joined the Republican forces, and was killed in an engagement with the imperialists.