Hi
Its going to be a tricky one!!!
I have found a Triton William Coulling born in Romford Sept Qtr 1838 ref volume 12 page 191.
Any chance he was born outside of Cornwall??
I know with my lot they couldn't quite decide where they were born from one census to another
If this is him he is probably the son of
Sarah 35 wife of a Fisherman (would explain where Triton came from) 1841 Barking
Just a thought?

Cal