A violent and protracted fever came on. In the course of it, an incident occurred which strikingly illustrates the boldness and originality of Alexander's character. The name of his physician was Philip. Philip had been preparing a particular medicine for him, which, it seems, required some days to make ready. Just before it was presented, Alexander received a letter from Parmenio, informing him that he had good reason to believe that Philip had been bribed by the Persians to murder him, during his sickness, by administering poison in the name of medicine. He wrote, he said, to put him on his guard against any medicine which Philip might offer him.