Faldage - Absolutely. The moment I started to read your post it all came back to me, even the Latin tag. I still think the story is most likely a nice invention! Interesting, as you point out, that the pun suggests that the 'g' was hard in angeli.

Thanks for the correction. I checked back from the link and found that the book containing it was published in 1985. Well ... it's a pretty enough tale.