Oh my goodness - that's a tall order - was that all Yorkshire or North Riding?
I was going to look at Guisborough (NR) census area to start with, either a John with a daughter Mary, or a Mary with a father John. Mary could be anywhere from 2 years to 10 years on the 1841 census going by the data we have for her. But were true ages given for under 15s on the 1841 census? Were they also rounded down?
This would have meant find one on the index then view record. 605 times

I think Hovingham also falls into the North Riding.
Calling it a night - we are 2 hours ahead of U.K. here.
Many thanks - back on the trail tomorrow.
Margaret