Botts book can also be found here in one of those Google books. http://books.google.com/books?id=Vy4OAAAAIAAJ&pg=PA194&lpg=PA194&dq=%22jb+baldwin%22+confederate+virginia&source=web&ots=SBKu2wFkJz&sig=LWhQD237kMp2suHRRmMlBp6orH8
Botts is a somewhat questionable source. He was a minor league politician with thoughts of grandeur. But apparently on this matter he had some corroborating letters and testimony.