That word "vellum" reminds me of the time that
Jon Host and I wrote a song with a lot of V words in it, not on purpose, I mean, we didn't include a bunch of V words on purpose, as far as I recall. Vellum was one. We rhymed it with "quell 'em." And there was a "vast unholy vector/ that dominates this sector/ and desecrates the rectory." Move over,
Sondheim! Anyway, you'll never hear it.