Children of Dea. Edward Fobs and Elizabeth Howard: "Mary 1681" ... "Mary never m.".
[Undoubtedly this is the source of all the books and websites that claim "Mary never married", but it would be nice to have a death record, as that would seem to be the only way to show "never" is an accurate description, as opposed to, say, "was still single when her father's will was probated", or whatever happens to be the basis for this statement.]