Colonel John Singleton Mosby of the Confederate Army and Commanding Officer of the 43rd Battalion, 1

Colonel John Singleton Mosby of the Confederate Army and Commanding Officer of the 43rd Battalion, 1st Virginia Cavalry or “Mosby’s Rangers”.

Mosby apparently said of this photograph, that it was his favourite according to http://www.findagrave.com/cgi-bin/fg.cgi?page=pv&GRid=3080&PIpi=18908470

But I cannot confirm this.