Here is a list of children born to a William & Dorothy Naylor in Yorkshire around this time:
September 3rd, 1826 in Well, Yorkshire: James, son of William & Dorothy Naylor, abode: Well, father's occupation: mason.
August 6th, 1828 in Well, Yorkshire: Jane, daughter of William & Dorothy Naylor, abode: Nelson by, father's occupation: stone mason.
March 21st, 1830 in Kirkby Ravensworth, Yorkshire: George, son of William & Dorothy Naylor, abode: Gayles, father's occupation: quarry-mason.
The father's occupation matches, so it looks like Dorothy was last seen in 1830 in Kirkby Ravensworth?
I can see that in 1841, James is an apprentice whitesmith to Robert Hewson (brother of Dorothy) and is residing with him and his wife, Jane. No other siblings present.
I'm not having much luck trying to find the other children or their father in 1841. It would be good to see where he was living, as it may provide a clue as to where Dorothy was buried.
Queenie
