I realise back in his day Eugenics were gaining more and more support but wow this caught me off-guard.
the prisoners all proved to be men of a very low, mixed-blooded, and mentally aberrant type. Most were seamen, and a sprinkling of negroes and mulattos, largely West Indians or Brava Portuguese from the Cape Verde Islands, gave a colouring of voodooism to the heterogeneous cult. But before many questions were asked it became manifest that something far deeper and older than negro fetishism was involved. Degraded and ignorant as they were, the creatures held with surprising consistency to the central idea of their loathsome faith.
Still love his Cthulhu mythos though, even if some of his stories are surprisingly boring.