I thknk the mses are at the Bodleian. Not sure tho.

I do buy his argument--his reasons were meticulous and clear, though I don't remember them all now. But the biggest was the astonishing difference in style: he thinks Ja abandoned the rewrite after getting to the joke about Mr Tilney's curricle and many-caped coat as opposed to being abducted by mysterious horsemen right off the road.