Hi Cathy
Have you got the death certificate for George? Or even an exact date from other sources?
Cockermouth Registration District would cover Keswick. You've a census in Keswisk.
If he did actually die in Keswisk, by this date, eithter church could apply. I know families who are split between the two. Crosthwaite was the whole area, but the church is still in Keswick, albeit on the edge, and many Keswick folkattended as they still do. St John's is nearer the centre on the other side and is the town church with its own burial ground, but either could apply.
Of course, he could have been taken back to a family plot out of town such as St John's in the Vale or \Threlkeld or wherever they'd lived. Or they could have moved to Cockermouth by the time of his death.
If you have quite a good date, someone might look in the papers for an announcement, but there are quite a few to choose from. Some people used a Penrith or Cumberland paper.
If you're unlucky, it's really a death certificate for these large districts unfortunately.
Last time I was at the record office, we got a lot of information from one of these churches but the other stopped quite early and I'm sorry I can't remember the details.
If you had an exact date, they might checlk both for you.
Someone might check the grave if you could find the number.
I'll see what I can see.
Best wishes
Emms