Any one who is of sound mind may arrest his own slave, and do with him whatever he will of such things as are lawful; and he may arrest the runaway slave of any of his friends or kindred with a view to his safe-keeping.  And if any one takes away him who is being carried off as a slave, intending to liberate him, he who is carrying him off shall let him go; but he who takes him away shall give three sufficient sureties; and if he give them, and not without giving them, he may take him away, but if he take him away after any other manner he shall be deemed guilty of violence, and being convicted shall pay as a penalty double the amount of the damages claimed to him who has been deprived of the slave.  Any man may also carry off a freedman, if he do not pay respect or sufficient respect to him who freed him.  Now the respect shall be, that the freedman go three times in the month to the hearth of the person who freed him, and offer to do whatever he ought, so far as he can; and he shall agree to make such a marriage as his former master approves.  He shall not be permitted to have more property than he who gave him liberty, and what more he has shall belong to his master.  The freedman shall not remain in the state more than twenty years, but like other foreigners shall go away, taking his entire property with him, unless he has the consent of the magistrates and of his former master to remain.  If a freedman or any other stranger has a property greater than the census of the third class, at the expiration of thirty days from the day on which this comes to pass, he shall take that which is his and go his way, and in this case he shall not be allowed to remain any longer by the magistrates.  And if any one disobeys this regulation, and is brought into court and convicted, he shall be punished with death, and his property shall be confiscated.  Suits about these matters shall take place before the tribes, unless the plaintiff and defendant have got rid of the accusation either before their neighbours or before judges chosen by them.  If a man lay claim to any animal or anything else which he declares to be his, let the possessor refer to the seller or to some honest and trustworthy person, who has given, or in some legitimate way made over the property to him; if he be a citizen or a metic, sojourning in the city, within thirty days, or, if the property have been delivered to him by a stranger, within five months, of which the middle month shall include the summer solstice.  When goods are exchanged by selling and buying, a man shall deliver them, and receive the price of them, at a fixed place in the agora, and have done with the matter; but he shall not buy or sell anywhere else, nor give credit.  And if in any other manner or in any other place there be an exchange of one thing for another, and the seller give credit to the man who buys from him, he must do this on the understanding that the law gives no protection in cases of things sold not in accordance with these regulations.