38. It is clear to me therefore by every kind of proof that Cambyses was mad exceedingly; for otherwise he would not have attempted to deride religious rites and customary observances. For if one should propose to all men a choice, bidding them select the best customs from all the customs that there are, each race of men, after examining them all, would select those of his own people; thus all think that their own customs are by far the best: and so it is not likely that any but a madman would make a jest of such things. Now of the fact that all men are thus wont to think about their customs, we may judge by many other proofs and more specially by this which follows:—Dareios in the course of his reign summoned those of the Hellenes who were present in his land, and asked them for what price they would consent to eat up their fathers when they died; and they answered that for no price would they do so. After this Dareios summoned those Indians who are called Callatians, who eat their parents, and asked them in presence of the Hellenes, who understood what they said by help of an interpreter, for what payment they would consent to consume with fire the bodies of their fathers when they died; and they cried out aloud and bade him keep silence from such words. Thus then these things are established by usage, and I think that Pindar spoke rightly in his verse, when he said that "of all things law is king." 28 39. Now while Cambyses was marching upon Egypt, the Lacedemonians also had made an expedition against Samos and against Polycrates the son of Aiakes, who had risen against the government and obtained rule over Samos. At first he had divided the State into three parts and had given a share to his brothers Pantagnotos and Syloson; but afterwards he put to death one of these, and the younger, namely Syloson, he drove out, and so obtained possession of the whole of Samos. Then, being in possession, 29 he made a guest-friendship with Amasis the king of Egypt, sending him gifts and receiving gifts in return from him. After this straightway within a short period of time the power of Polycrates increased rapidly, and there was much fame of it not only in Ionia, but also over the rest of Hellas: for to whatever part he directed his forces, everything went fortunately for him: and he had got for himself a hundred fifty-oared galleys and a thousand archers, and he plundered from all, making no distinction of any; for it was his wont to say that he would win more gratitude from his friend by giving back to him that which he had taken, than by not taking at all. 30 So he had conquered many of the islands and also many cities of the continent, and besides other things he gained the victory in a sea-fight over the Lesbians, as they were coming to help the Milesians with their forces, and conquered them: these men dug the whole trench round the wall of the city of Samos working in chains.