Darl L. Stephenson cites the origin in his book, Headquarters in the Brush- Blazer’s Independent Union Scouts. On page 321, note 10: “The term Jessie Scouts is attributed by William Gilmore Beymer to a group of scouts serving under General Fremont in the early days of the war in the Valley...he named them after his wife..” Beymer wrote On Hazardous Service: Scouts and Spies of the North and South (1912).