What is the origin of the expression "I wouldn't ... for all the tea in China"? I've heard it from a British speaker, and I am guessing it may be of British origin, but I couldn't find a reference for it.
The Facts on File Dictionary of Cliché by Christine Ammer says:
The earliest result for "all the tea in China" in Google Books is in 1895's The Amateur Fisherman's Guide by Charles Thackeray. There's no preview so it cannot be verified, but it's plausible as Thackeray also founded the Amateur Fishermen's Association of New South Wales in 1895.
The earliest result The Phrase Finder can find to verify the date is from an Australian 1914, but I found an earlier instance in New Zealand's Marlborough Express of 9 September 1907 (actually in a "What The Papers Say" section, credited to the Post):