I should have done this in the first place. The MOC has a digital file on its website, I just located it.
http://moconfederacy.pastperfectonline.com/webobject/713D6A36-2547-420F-8B31-665095768250
It does state the 15th of December, but it also states battle at Richland Creek so there may be a clerical error when it was sent to the war dept.