Several burial records of William Towers in Froyle, but no ages given:
9 Aug 1669 - unlikely to be the senior William if he was still having children baptised in 1670s
15 Sep 1733 - possibly, or could be his son
16 Feb 1747- maybe the son
6 Nov 1755 - again maybe the son
Original PRs might help sort out which one might be yours.
Baptism of Mary - large number of possibilities. Would this query not be better as a separate request since I don't see a connection to the Towers family

Did I miss something? I had to look through your other posts to find which St. John's church it was where she married (Winchester, I found) and that post
http://www.rootschat.com/forum/index.php?topic=784006.msg6387656#msg6387656 also indicated that she was resident in Farley Chamberlayne at that time. There is one at Winchester St John's on 1 May 1711 - father John Smith. But there is also one at Winchester St Peter in the same year, father Samuel. Impossible to have any certainty without something else to help tie the generations together.
Nell