"Bubonic plague infection causes tiny blood vessels in the feet and toes to clog up and cut off circulation. Without blood, the flesh dies and turns black (called "gangrene"). This is why in the Middle Ages bubonic plague was called "the Black Death."
ah I see, similar causes leading to similar results, Numpty label withdrawn.
The story goes that when Gordon Banks had pushed Pele's (out of shot) bullet downward header round the post at the 1970 World Cup, Bobby Moore asked Banks not to give away 'any more unnecessary corners...'