40. Another mode of acquiring things according to natural law is traditional; for nothing is more conformable to natural equity than that the wishes of a person, who is desirous to transfer his property to another, should be confirmed; and, therefore, corporeal things, of whatever kind, may be so passed by tradition, and when so passed by their owner, are made the property of another.
In this way are alienated stipendiary and tributary lands, that is, lands in the provinces, between which and Italian lands there is now, by our constitutio, no difference, so that when tradition is made of them for purpose of a gift, a marriage portion, or any other object, the property in them is undoubtedly transferred.
41. But things sold and delivered are not acquired by the buyer until he has paid the seller the price, or satisfied him in some way or other, as by procuring some one to be security, or by giving a pledge. And, although this is provided by a law of the Twelve Tables, yet it may be rightly said to spring from the law of nations, that is, the law of nature. But if the seller has accepted the credit of the buyer, the thing then becomes immediately the property of the buyer.
42. It is immaterial whether the owner deliver the thing himself, or some one else by his desire.
43. Hence, if any one is instructed by an owner with the uncontrolled administration of all his goods, and he sells and delivers anything which is a part of these goods, he passes the property in it to the person who receives the thing.
Transfer the property in a thing
44. Sometimes, too, the mere wish of the owner, without tradition, is sufficient to transfer the property in a thing, as when a person has lent, or let to you anything, or deposited anything with you, and then afterwards sells or gives it to you. For, although he has not delivered it to you for the purpose of the sale or gift, yet by the mere fact of his consenting to it becoming yours, you instantly acquire the property in it, as fully as if it had actually been delivered to you for the express purpose of passing the property.
45. So, too, anyone who has sold goods deposited in a warehouse, as soon as he has handed over the keys of the warehouse to the buyer, transfers to the buyer the property in the goods.
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