Per page 59 of the Journal and Proceedings of the Missouri State Convention 1861.
Leeper, Orr, and Ritchey.

Per the Names of the Delegates on Page 5:
William T. Leeper was a 38-year-old farmer, born in Tennessee, who lived in Greenville, Wayne County, Missouri.
Sample Orr was a 44-year-old lawyer, born in Tennessee, who lived in Springfield, Green County, Missouri.
M. H. Ritchey was a 49-year-old farmer, born in Tennessee, who lived in Newtonia, Newton County, Missouri.