Dear Anthony,
Do you know if the family has any connection to Great Hallingbury? I also have ancestors John and Elizabeth SAPSFORD but they hail from Great Hallingbury, as do a large number of other SAPSFORDS in this period.
I'm currently doing a bit of a One Place Study of Great Hallingbury to work out more about my SAPSFORDS as there were quite a few of them and they married into many of the other families in the area.
If I come across anything that might help you I will let you know.
Cheers,
Michelle