I have thri marriage as stated above. Their daughter Mary was baptised in felsted 1/5/1757
I couldn'tfind either John or Sarah being baptised in felsted or stebbing or little dunmow but did find these in great dunmow: John wood baptised 1/2/1718 to William and Elizabeth. Sarah baptised 3/4/1737 to Peter and Sarah. Bit of an age gap but not unusual in those days I suppose.
Can anyone see anything else more likely? Great dunmow isn't far from felsted.
Thanks