A modern parable! No, I don’t own a music shop, but doing this strip makes me wish I did.
Some clefs I didn’t get a chance to go into:

One may notice I mentioned the C-clef (which also serves as alto clef for the viola), but I didn’t really get into it. Welllll…frankly, I couldn’t find much of anything on its evolution. I’m disappointed; judging from its current shape, its original had to be a doozy. Apparently a more squared appearance shows up in plainchant sheet music, but there simply wasn’t enough to put into the comic. There’s also the neutral or percussion staff, which resembles a hollow box; kinda like when a non-ASCII character crashes your ASCII party.
Also I jammed Dies Irae in there because I cannot help myself. I must be stopped
Did you look up Tenor Clef for shaping origins? It’s the same symbol as the Alto but centered on the 2nd line (which is still C–silly cellists).
No! Silly me, I figured any information would be under the C-clef, since it’s the same damn clef, only moved up and down the staff. 😛