Matt.... If I remember correctly, Blunt pushed back to Rhea's Mills first to protect his stores before realizing that the battle was at Prairie Grove. I may be wrong but Terry is correct in that, to date, Mike Banasik's book is the authority on this. However, I anticipate that Bill Shea's book on Prairie Grove will be out soon and he will have something to say about it as well.
If you don't have access to "Embattled Arkansas", I have a copy and can look it up for you.
Howard Mann
By the way, what is the great picture above of? If it is a Prairie Grove reunion, do you know who they are and what year it occurred in?