Black Genii

Written by Terence Roberts

Copyright 1966

First published in The Saint Magazine (UK) and in The Saint Magazine (US), both August 1966. 
In the beliefs of the people of the Caribbean, scary spirits are called 'Chumbies' and they are not to be messed with. When Tar investigates what some are calling an influx of those creatures, he finds they are quite dangerous, especially with knives.