http://books.google.com/books?id=t1Ju6bBMvDAC&pg=PA196&dq=Union+colors+captured+at+Vicksburg&hl=en&ei=Y6ltTcOgJYjqgAeh0NSMBA&sa=X&oi=book_result&ct=result&resnum=8&ved=0CFYQ6AEwBw#v=onepage&q=Union%20colors%20captured%20at%20Vicksburg&f=false
If that link should not work, "Twenty-seventh Louisiana Volunteer Infantry" By Terry G. Scriber
I just found that on "Google Books".
Hope that helps somebody!
Shawn Prouty