Are you aware that a book by someone, apparently a distant relative of yours, was written on the Manghams in the Civil War? If I'm not mistaken your ancestor Arthur Green Mangham has a write up in the book. The Amazon address is, http://www.amazon.com/gp/offer-listing/1889332402/ref=dp_olp_new?ie=UTF8&qid=1299642466&sr=1-1&condition=new . I believe you can contact the author through amazon to verify.