During my five years of involvement with the DQ of Amherst College, I wrote about a dozen arrangements. I have studio recordings of about half, and scores for just a few.
The year after I graduated, the group went co-ed. I was still in Amherst, working as the assistant choral director. So I wrote three arrangements for the group; all three were later recorded.
"Four" is one of my favorite examples of "vocalese": writing lyrics to fit an improvised melody. The original improvisations are by Miles Davis and Horace Silver from the Davis album Blue Haze; the lyric is by Jon Hendricks.
This was a "proof of concept" arrangement, written and initially performed when the group was still all male, with the Bluestockings singing the upper voices.
The last a cappella arrangement I ever wrote, and the first I wrote without referencing an existing recording.