If you want the Latham, by all means, keep it. It was only that Draco drew in cracked the binding on mine when he was very young and I remembered that Ignatius' copy had some additional end papers of some interest.

And no, indeed, none of us had leisure by then for idle manuals of style, though you will find, I think, that if one can get past the usual waffle on technique, the parenthetical commentary is highly amusing.