then only he gives vent to his anger. Moreover they say that no one ever killed his own father or mother, but whatever deeds have been done which seemed to be of this nature, if examined must necessarily, they say, be found to be due either to changelings or to children of adulterous birth; for, say they, it is not reasonable to suppose that the true parent would be killed by his own son. 138. Whatever things it is not lawful for them to do, these it is not lawful for them even to speak of: and the most disgraceful thing in their estimation is to tell an lie, and next to this to owe money, this last for many other reasons, but especially because it is necessary, they say, for him who owes money, also sometimes to tell lies: and whosoever of the men of the city has leprosy or whiteness of skin, he does not come into a city nor mingle with the other Persians; and they say that he has these diseases because he has offended in some way against the Sun: but a stranger who is taken by these diseases, in many regions 153