Erin -
Thanks for your post. My James from Tip was married in Chicago to Catherine Hackett by 1873, so I can say with some confidence he was not married in London in 1877, but thanks for checking. Actually that James was the son of a James, and there were four more in a direct line after him, so we must not be an imaginative lot. But if you find any stray nuggets that aren't yours, send 'em my way and I will do likewise.
Mary