You're right, tsuwm--thanks. I should have checked before posting; sorry. Here's a pretty good one, though it's PDF--the HTML version isn't as good:
trying again

Ah ha--found the Discovery Ch. one that works--I'll go replace it now, above.
Edit: [smacking palm to forehead] The one I "found" is the same as yours, M--I didn't at first realize that your 'gardyloo' was a link!

I should say, the reason I decided to use this term was the stated relationship between dung and gong: that's what I'd really like a citation for, and haven't been able to find.

Here's a slight hint re: the secret: the submitter is a clue. (More to follow, if needed...)