Michelle, per the following paragraph from your message. I derive that Thomasin had a daughter Mary and a son Alexander from a previous marriage to a Campbell. Could Mary Marshall be Mary Campbell? Could Abraham Marshall have adopted (on 7 Jan 1699) her and thus she changed her name to Mary Marshall? But then why would she have married her brother, Alexander? Any thoughts? f131r-Abraham MARSHALL, blacksmith, will; 3 Nov 1708, 6 Jul 1709 wife Thomasin use of plant. and lands in NFP, after her death, to dau. Mary Campbell, if she has no heirs, to brother John Marshall of Bradfield in Berkshire in the Kingdom of England, and if he has no heirs, to go to John Durham (son of Thomas Durham) of NFP; s-i-l Alexander Campbell; ex: wife; wits: Thomas Morgan, Alexander Thompson, [Mil.] Walters. [The birth of Mary Marshall to Abraham and Thomasin was recorded on 7 Jan 1699 yet apparently she had mar. Alexander Campbell by Nov 1708.NFPR. p. 126; MRC p.32]