LesB... ".... exhausted marraige searches... "
You've hardly started lol.
Although Percy Main lay within the boundaries , just, of Tynemouth Parish, Howden, Howden Pans and Willington all lay just on the other side of Tynemouth Parish boundary - in Wallsend Parish.
Hetton-le-Hole lay within Houghton le Spring Parish
Hetton Downs lay with same parish until 1832, then it was in Hetton le Hole Parish.
East Hetton was in Hetton St Helens
South Hetton was Easington Parish up to 1838, then in South Hetton Holy Trinity.
And that's only Anglican churches ! What if they were "non-comformists" ?
Do you have any church baptisms for Ralph/Mary's children ? ... indicating their religious denomination ?
Was Ralph a "sinker" before he as a " coal miner". Sinkers were specialists and very mobile. Dig a pit, then move on to dig another one and so on .
Michael Dixon