1911 Encyclopædia Britannica, Volume 18… (1911)
“ He enlisted as a private in the Washington Mounted Rifles, which became a part of General J. E. B. Stuart’s 1st Virginia Cavalry, and of which he was adjutant for a time. In June 1862, after having gone over the ground alone on scouting duty, he accompanied Stuart in his ride round McClellan’s entire army. Early in 1863 he secured Stuart’s permission to undertake a quasi-independent command. In Fairfax county and then in Fauquier and Loudoun counties (known as Mosby’s Confederacy) , within the Federal lines, he raised, mounted, armed and equipped a force of irregulars. ”
