In the original : "Bulluc sterteş, bucke uerteş,"
Yup - though Tolkien does seem to have written his own version of this here, which might be actually be heort(e) sterteth, bulluc uerteth. This would be fine Middle English (heortwould, as far as I can tell with my rather slender grasp of Middle English, be the form expected for the 'AB' dialect, which could be kind of interesting). If he actually wrote heorot, that would have to be a bit of Old English worming its way in.
I wish it was just a little less blurry so we could make out that footnote better.
It is hard indeed to believe that one of so great wisdom, and of powerfor many wonderful things he did among uscould perish, and so much lore be taken from the world.