Mary didn't even have Charles's name correct (if it wasn't a clerical error) Charles Grouth Smith. Remembering Charles was in Whitby as at the 1861 census, and Mary would fall pregnant with Charles around August 1862 - I don't think she had known him all that long!!
I wish we could access the mine records to see when Charles started work there, but they seem to be "lost". They were in the British Steel Archive, then taken over by Corus and "supposedly" passed on the Middlesbrough Archive. I have asked about them (a long time ago) and was advised they were still sorting the mine records out - perhaps it's time I asked again!
Margaret