Again, as to contributions, any man who likes may go about collecting contributions as a friend among friends, but if any difference arises about the collection, he is to act on the understanding that the law gives no protection in such cases.  He who sells anything above the value of fifty drachmas shall be required to remain in the city for ten days, and the purchaser shall be informed of the house of the seller, with a view to the sort of charges which are apt to arise in such cases, and the restitutions which the law allows.  And let legal restitution be on this wise:  If a man sells a slave who is in a consumption, or who has the disease of the stone, or of strangury, or epilepsy, or some other tedious and incurable disorder of body or mind, which is not discernible to the ordinary man, if the purchaser be a physician or trainer, he shall have no right of restitution; nor shall there be any right of restitution if the seller has told the truth beforehand to the buyer.  But if a skilled person sells to another who is not skilled, let the buyer appeal for restitution within six months, except in the case of epilepsy, and then the appeal may be made within a year.  The cause shall be determined by such physicians as the parties may agree to choose; and the defendant, if he lose the suit, shall pay double the price at which he sold.  If a private person sell to another private person, he shall have the right of restitution, and the decision shall be given as before, but the defendant, if he be cast, shall only pay back the price of the slave.  If a person sells a homicide to another, and they both know of the fact, let there be no restitution in such a case, but if he do not know of the fact, there shall be a right of restitution, whenever the buyer makes the discovery; and the decision shall rest with the five youngest guardians of the law, and if the decision be that the seller was cognisant of the fact, he shall purify the house of the purchaser, according to the law of the interpreters, and shall pay back three times the purchase-money.

If a man exchanges either money for money, or anything whatever for anything else, either with or without life, let him give and receive them genuine and unadulterated, in accordance with the law.  And let us have a prelude about all this sort of roguery, like the preludes of our other laws.  Every man should regard adulteration as of one and the same class with falsehood and deceit, concerning which the many are too fond of saying that at proper times and places the practice may often be right.  But they leave the occasion, and the when, and the where, undefined and unsettled, and from this want of definiteness in their language they do a great deal of harm to themselves and to others.  Now a legislator ought not to leave the matter undetermined; he ought to prescribe some limit, either greater or less.  Let this be the rule prescribed:  No one shall call the Gods to witness, when he says or does anything false or deceitful or dishonest, unless