Even Hammurabi could not entirely guarantee the safety of such traders, for attacks by brigands were then as common in the Nearer East as at the present day; and there was always the additional risk that a caravan might be captured by the enemy, if it ventured too near a hostile frontier. In such circumstances the king saw to it that the loss of the goods was not borne by the agent, who had already risked his life and liberty in undertaking their transport. For, if such an agent had been forced in the course of his journey to give up some of the goods he was carrying, he had to specify the exact amount on oath on his return, and he was then acquitted of all responsibility. But if it could be proved before the elders of the city that he had attempted to cheat his employer by misappropriating money or goods to his own use, he was obliged to pay the merchant three times the value of the goods he had taken. The law was not one-sided and afforded the agent equal protection in relation to his more powerful employer; for should the latter be convicted of an attempt to defraud his agent, by denying that the due amount had been returned to him, he had to pay his agent as compensation six times the amount in dispute. The merchant always advanced the goods or money with which to trade, and the fact that he could, if he wished to do so, fix his own profit at double the value of the capital, is an indication of the very satisfactory returns obtained at this period from foreign commerce. But the more usual practice was for merchant and trader to share the profits between them, and, in the event of the latter making such bad bargains that there was a loss on his journey, he had to refund to the merchant the full value of the goods he had received. At the time of the First Dynasty asses and donkeys were the beasts of burden employed for carrying merchandise, for the horse was as yet a great rarity and was not in general use in Babylonia until after the Kassite conquest.[29]