I was cycling to a barrel organ meeting last night when I passed a group of Moroccans, one of whom threw something at me while another shouted “Nigger!” If I’d been slightly more awake, I’d have done a bit of ironic chromatic inversion on Blake.
There’s a good organ miscellania page here. The Sultan and I anecdote was one of the few useful pieces of information I knew as a child. The Spanish connection lies in the Novelda rock organ, of which more here, and the information that “Spanish organs of the 18th century include a number of mischievous sound…