Hello. Have been to this man before but after some more work and in the context of a professional genealogist working on him, i wonder if i could check if there might be something else out there.

His origin is very uncertain: all we have is the 1851 census: he is md to Sarah nee Watkins and has 3 children. Born c1801 in Ardleigh, Essex. No records found re this. Many Greens abound. No
clear links at all. On his 2nd mg in 1844 to Sarah he is a widower. Much work on this but nothing certain. We think his first wife was Elizabeth Langlands, widow. Md in Weeley in 1819. No issue found. His 4th child, Jane, my ggm, born in 1855 Weeley. But at mg of Jane's older brother John in 1866, his record says their father is 'deceased'. Jane md in 1881 to my ggf George Kemp. Jane gives her father as 'deceased' a 'Butcher'. We have a death for Eliz. Green in 1841 which fits with our sequences.
On Robert's mg to Sarah in 1844 he gives his father as a Robert Green, and he is a 'Miller'. Nothing found on father. Lots of Roberts with fathers Robert. Many from 'out of county'.
Research has indicated that the Welsh cattle industry was prevalent and robust for centuries: Sarah was from mideastern Wales but we don't know if she came via the Wales-London route met Robert in London then went to Essex or whether she came across country direct to Essex. Robert/Sarah's first child John b 1845 became a butcher and cattle dealer for decades. I've contacted Smithfields archives looking for records! Son John md a girl from Hereford. Sarah's age is conflicting also; we have an SW in West London aged about 20.
Any further help or clarification will be joyously received. Julie