As for the law of property, it was rudimentary, and inextricably mixed up with precautions against theft and charges of theft. A prudent buyer of cattle had to secure himself against the possible claim of some former owner who might allege that the beasts had been stolen. The only way to do this was to take every step in public and with good witness. If he set out on a journey to a fair, he would let his neighbours know it. When he did business either far or near, he would buy only in open market and before credible persons, and, if the sale were at any distance from home, still more if he had done some trade on the way without having set out for the purpose, he would call the good men of his own township to witness when he came back driving his newly-gotten oxen, and not till then would he turn them out on the common pasture. These observances, probably approved by long-standing custom, are prescribed in a whole series of ordinances on pain of stringent forfeitures.[54] Even then a purchaser whose title was challenged had to produce his seller, or, if he could not do that, clear himself by oath. The seller might produce in turn the man from whom he had bought, and he again might do the like; but this process (“vouching to warranty” in the language of later medieval law) could not be carried more than three steps back, to the “fourth hand” including the buyer himself. All this has nothing to do with the proof of the contract in case of a dispute between the original parties to the sale; it is much more aimed at collusion between them, in fact at arrangements for the receipt and disposal of stolen goods. The witnesses to the sale are there not for the parties’ sake, but as a check in the public interest. We are tempted at first sight to think of various modern enactments that require signature or other formalities as a condition of particular kinds of contracts being enforceable; but their provisions belong to a wholly different category. Another archaic source of anxiety is that borrowed arms may be used in a fatal fight and bring the lender into trouble. The early notion would be that a weapon used for manslaying should bring home the liability with it to the owner, quite regardless of any fault; which would afterwards become a more or less rational presumption that he lent it for no good purpose. Then the risk of such weapons being forfeited continued even to modern times. Hence the armourer who takes a sword or spear to be repaired, and even a smith who takes charge of tools, must warrant their return free from blood-guiltiness, unless it has been agreed to the contrary.[55] We also find, with regard to the forfeiture of things which “move to death,” that even in case of pure accident, such as a tree falling on a woodman, the kindred still have their rights. They may take away the tree if they will come for it within thirty days.[56]