"Col. Bob McCulloch, of the Second Missouri, commanded a brigade consisting of his own regiment and the First Mississippi."

Page 58, Publications of the Mississippi Historical Society
http://books.google.com/books?id=jX1gXsXFPr0C&pg=PA60&lpg=PA60&dq=Capture+of+Holly+Springs&source=bl&ots=KJU0opoD5q&sig=iymdnsyP1ulaGWCGkcoX9RLzRTI&hl=en&ei=9OqqSdCiGZnMsAOz7-jsDw&sa=X&oi=book_result&resnum=6&ct=result

If you can't open this page, do a Goggle search, Capture of Holly Springs, it comes up on the second page

Publications of the Mississippi Historical Society - Google Books Result
by Mississippi Historical Society - 1906 - History - 612 pages
The capture of Holly Springs by Dr. JG Deupree, of the University of Mississippi , is an interesting story, by a survivor of the famous column of cavalry ...
books.google.com/books?isbn=0559460686...

Bearss sources this document as Deupree, "The Capture of Holly Springs," Mississippi Historical Society, IV, starting of page 55