[1] Yellott was elected to the Maryland House of Delegates, representing Harford County, as a Whig from 1842 to 1843.

He then moved to Baltimore and was elected as a member of the American Party to the Maryland Senate from 1860 to 1861.

The bill would create a commission above the Governor and prepare a militia for the defense of the state, and presumably take Maryland into the Confederacy.

He then accepted an appointment as major and clerk of the military court which was attached to the Army of Southwestern Virginia.

[1] Yellott died on July 28, 1870, at the house of his brother-in-law, Colonel A. T. M. Rust, in Leesburg.