The scope of the ancient obligation was not extended without the warrantor's assent.

For the sale of ancient chattels, there must be a surety and a warrantor.

If the warrantor lost, he would have to give to his vassal equivalent land in exchange.

Only those who were privy in estate with the person to whom the warranty was originally given, could vouch the original warrantor.

But if my warrantors, King Arthur and his knights, be there, the barons will not dare dispute the judgment.