The following is excerpted from Fredrick Todd’s classic reference work, American Military Equipage, 1851-1872, Volume II – State Forces, Chapter 56 – Virginia. Todd does not detail the specific sources behind each datapoint he presents, but his work draws heavily on the annual reports of the Adjutant General of Virginia, as well as the expertise of the Virginia Historical Society and Museum of the Confederacy (now the Museum of the American Civil War). The portions of Chapter 56 dealing with units of the Stonewall Brigade are presented below with minimal edits. 

2nd Regt Vols (Jefferson County) 1860-1861; Become 2nd Vol Inf Regt (1st Regt, Stonewall Brig; Allen’s) 1861-1865
(Included Jefferson Guards and Cadets, Hamtramck Guard, Botts Grays, etc.)
1861: Companies largely clothed in gray uniforms; some companies wore blue or red shirts; most had knapsacks; percussion musket. Regiment carried state flag until late November 1861, when given Army of Northern Virginia [ANV] battle flag [Editor’s Note: The flag presented to the 2nd Virginia, as well as all other Virginia regiments, in November 1861 was actually a Virginia state flag rather than the ANV battle flag, which did not enter wide production until summer 1862].