Hello
I have noticed the Sawston bapt and thought that could be a possibility.
Theophilus Marsh son of William 1642-1708 is listed as attending Cambridge University 1709 'Theophilus Marsh, Son of William Marsh of the Isle of Ely'
Have Baptism as 'Theophilus Marsh 25 Sep 1690 Ely, son of William and Elizabeth'