It's a while since we looked at Joseph Wingrove Smith - I seem to recall Stroudie also looked at his one some time ago and could find no references to the Wingrove part - perhaps she will recall when next she is on line.
It all looks so straight forward doesn't it when one sees all the data from 1863 onwards - what could be easier than just checking back 1861, 1851, 1841, for Mary Smith

but it's as if she just appeared out of thin air.
I know the Burnside / Bradley route looks very promising. I mentioned previously Mary has doggedly stuck to the fact that she was born in Yorkshire. And why the difference between how she registered Charles 1863 and the info she gave for his baptism. She was obviously illiterate and had something she wanted to hide.
The reference to Eggeven/Oggeven in 1901 could so easily be Hovingham.
Any ideas what parish church would be used for Hovingham residents - baptisms etc?
Another coincidence struck me this evening. My aunt (Mary's grandaughter) married in 1913 a man whose mother was from Coxwold (where James Bradley was born) - and she was a Smith!!
Who was Mary Smith age 15 1851 census working in Skelton, born Brotton?
I have a contact in the U.K. with an Ancestry subscription, I will ask her if she has the one where she could access the criminal record
Margaret