Tattie Bogle - I just bought a washboard from a junk shop in Innerleithen today too! How many has that town got?

Glass washboards are musically useless (unless maybe you mike them up).

I adapt washboards. Cut the metal in half not-quite-diagonally to make two trapezoids and set in a plywood surround to make a board with a triangular wooden area. Hold fore-and-aft, hit with five thimbles in each hand, from both sides. The result is something that can convincingly replicate the rhythms of a Scottish dance band drummer.

I have one of the frame drums with rings. I bought mine in Urfa, it's the Kurdish variant. The rings seem to be a Central Asian idea originally, like chain mail.

BTW Monserrat was populated by a lot more Africans and Caribs than Irish. If it has any indigenous frame drum it's surely more likely to have come from North America or Africa.