Hello Postlethwaite,
We're not trying to confuse you, I'm sure it must be difficult for you when you don't have a lot of the earlier information to go on, but you may have to do a bit more digging for yourself before we can help further.

You say you are looking for his birth and death, so why not start with them, can you say where have you already looked? (just to save others looking in the same places)
Or you could begin with the marriage certificate that looks likely for him (Emms gave the reference earlier) and also if you have a look for him in the 1911 census, spending a few credits on that may well be worthwhile giving you a bit more information about him.
What about looking at trade directories for the Keswick/Braithwaite areas to see if he is listed as hotel owner or fishmonger?
Kind regards,
Barbara
