Hi Dave
I've just found all the postings re John Levis. Reuben Levis born 1824 was my GGG Grandfather. I have his marriage certificate - he married Mary Taylor on 09 Nov 1846 at Sawtry All Saints. His father is recorded as John Levies, Labourer. Both Reuben and Mary "made their mark". Mary's father was John Taylor, but I haven't got any further back with that branch.
You may be interested in the Ramsey St Mary Index (Hunts Record Office) which lists the children of Reuben and Mary Levis. I can give you that information if you don't already have it. I am descended from their daughter Rachel who married Thomas Cullup.
I also have Reuben's death certificate:
Died 07 Aug 1864, Horn Drove, Ramsey.
Male, aged 40, Farm Labourer.
Carcinoma (Stomach) 12 months certified
Informant is Sarah Lay, present at the death [not identified her yet, perhaps a local nurse?]
Hope this is helpful. We must be related!
Good luck, and keep posting!
Ruth.