Who are the three blind mice in lord of the flies?

There appear to have been four boys in the book who suffered from physical problems. Piggy suffered from Asthma, was seriously overweight and wore spectacles. Simon often fainted and seems to have suffered from grand mal epilepsy. The littlun who first mentioned the snake-thing had a mulberry-coloured birthmark on his face. Ralph often lost track of what he was saying, which is a classic symptom of petit mal epilepsy.