Coincidentally, I just saw this on Fold3 recently.

http://www.fold3.com/comments/sketchdon/

sketchdon
Following up on my comment below... If you find a card that references a "manuscript" of some type, here's where it should be: At the National Archives in D.C., ask for Record Group (RG) 109, "War Department Collection of Confederate Records (Miscellaneous Records) Manuscripts 1861-1865", Entry 183, and then whatever number your manuscript is. Mine was 6198 and it was in Box 72... so there's a lot of these records that have not been microfilmed and are not easily located.
22 Feb 2011