(M443) The slave had private property which was secured to him. He paid a sort of rent for it. This was an annual fixed sum called his _mandattu_, the same word as for the tribute of a prince to his overlord. In the case of a female slave this was twelve shekels _per annum_. Further, he paid a percentage on his profits.(450) The slave might hold another slave as pledge, lend money, and enter into business relations with another slave even of the same house. He might borrow money of another slave. Hence he was very free to do business. But when he entered into business relations with another master’s slave, or a free man, he sometimes met with a difficulty. He seemingly could not enforce his own rights against a free man. At any rate, we find that in such cases his master assumed the liability and pleaded for him. In fact, the master had to acknowledge his undertakings, though he did not guarantee them. Subject to this protection from his master, the slave was free to engage in commerce. He lent to free men, entered into partnership, and owned a scribe. (M444) Here is an example illustrating one of the above points.(451) S had taken a loan of L. His master, A, became aware of it and guaranteed its repayment. He then put S into L’s hands as his pledge to pay it off. Now, A died, and his son, B, sells S to C, as part of his own property. But L still holds possession of S. C demands S from L. L says “Not until my money is paid off. If C will do this he may have S. But until he can prove that it has been done he cannot have S.” The proof probably lay in B’s hands, if he had preserved it from his father A’s records. Delay is granted for C to produce the proof that S has worked off the debt. It is clear that the evidence of S was not admitted on this point.