A good article from the Newton County Mississippi Historical Society:
http://www.nchgs.org/html/griersons_raid.html
And a copy of Harper’s Weekly’ story on Grierson provided the Sons of the South:
http://www.sonofthesouth.net/leefoundation/civil-war/1863/june/grierson-raid.htm
It’s always nice to have more cavalry than you know what to do with.