This is a tune Gary learned twenty years ago (at least) from clarinet buddy Steve Gruverman. I’m not sure of the provenance of the Congo, as a dance in France, but it was popular in the 1920s with the Bal Musette, I believe. FRLO (Halloween 2022 edition) is Gary Chapin, Anahata, Martin Dumas, Matthew Bampton, Janneke Slagter, Gren Penn, Margaret Cox, and Barbara Truex.