« Reply #5 on: Sunday 05 May 13 10:49 BST (UK) »
Hi
It is most likely there is a transcription error on one of their surnames or Carson was not the surname Mary Ann used for marrying Robert. Or they didn't marry.
Have you been in contact with other people who have them in their tree's to see if anyone has birth certificates for their other children to see what details is given for the mother's names

Did you read the links I put on about others searching for same couple, I would like to know how one of them thinks his father is Thomas if there is no marriage certificate found

Keep searching
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HALL REEPHAM, HACKFORD, GUESTWICK, NFK
HALL YORK, HOLME ON SPALDING MOOR, E. YKS
HALL BELBY, Nr HOWDEN, E. YKS
HOUFE YORK, RICCALL, THIRSK, DURHAM, LANCASHIRE
FEATHERSTONE KNEDLINGTON, GILBERDYKE, E. YKS
CLAYTON PATRINGTON, KEYINGHAM, STADDLETHORPE, E. YKS
CAWOOD RAWCLIFFE, STADDLETHORPE
WALKER HADDELSEY, EASTRINGTON, SHIPTONTHORPE, E. YKS
BEAN STILLINGFLEET, ULLESKELF, KIRKBY WHARFE, YKS
TAYLES LINCS.