I think I'll have Father Macnamara's plot work, in that when Admiral Seymour lands in California he finds a republic ready to join Britain after it deals with the American revolutionaries within its borders. I think if Mexico goes to war over it, it would be little more than a couple battles and a blockade, but if incorrect I'd like input.
Simreeve:
Would Drake's claim have any impact on their (re-)conquest of California? I imagine it could be used to counter American claims that this violates their Monroe Doctrine, as the British have had a claim here long before the US existed.
Faeelin:
Yes, it would cost much more to get to California than Canada if one's coming from Europe whether one goes overland or entirely by sea. I had imagined that the weather and agricultural potential would draw people, as I think it is more attractive land than Canadian land. I might have too much faith in gold rushes, also.