He enacts that ???when goods are exchanged by buying and selling, a man shall deliver them and receive the price of them at a fixed place in the agora, and have done with the matter??? (xi. 915 D), and that ???he who gives credit must be satisfied whether he obtain his money or not, for in such exchanges he will not be protected by law??? (viii. 850 A). (d) Athenian law forbad an extortionate rate