I have just looked at the people living on Cleveland St, Hartlepool in 1851 -- of all the families living on that street then -- yours isn't there I'm afraid (at least I couldn't see them).
Funnily enough there was a lodger living on that street named 'John Gaulacher' -- but age looked like 36 -- a Dock Labourer, unmarried, born Ireland. Age is incorrect though (although you can never rely on that being correct).