The principal contracts known to the common law and suable in the King’s Courts, a century after the Conquest, were suretyship and debt. The heir, as the general representative of his ancestor’s rights and obligations, was liable for his debts, and was the proper person to sue for those which were due the estate. By the time of Edward III. this had changed. Debts had ceased to concern the heir except secondarily. The executor took his place both for collection and payment. It is said that even when the heir was bound he could not be sued except in case the executor had no assets. 1