By what process these serfs of a rural hamlet had grown into the busy burgesses whom we saw rustling their parchments and chinking their silver marks in the ears of Abbot Sampson in Richard's time, it is hard to say. Like all the greater revolutions of society, this advance was a silent one. The more galling and oppressive instances of serfdom seem to have slipped unconsciously away. Some, like the eel-fishery, were commuted for an easy rent; others, like the slavery of the fullers and the toll of flax, simply disappeared. No one could tell when the retainers of the abbey came to lose their exemption from local taxation and to pay the town penny to the alderman like the rest of the burgesses. "In some way, I don't know how,"--as Jocelyn grumbles about just such an unnoted change,--by usage, by omission, by downright forgetfulness, here by a little struggle, there by a little present to a needy abbot, the town won freedom. But progress was not always unconscious, and one incident in the history of Bury St. Edmunds, remarkable if only regarded as marking the advance of law, is yet more remarkable as indicating the part which a new moral sense of human right to equal justice was to play in the general advance of the realm. The borough, as we have seen, had preserved the old English right of meeting in full assembly of the townsmen for government and law. In the presence of the burgesses justice was administered in the old English fashion, and the accused acquitted or condemned by the oath of his neighbours, the "compurgators," out of whom our jury was to grow. Rough and inadequate as such a process seems to us, it insured substantial justice; the meanest burgher had his trial by his peers as thoroughly as the belted earl. Without the borough bounds however the system of the Norman judicature prevailed. The rural tenants who did suit and service at the cellarer's court were subject to the "judicial duel" which the Conqueror had introduced. In the twelfth century however the strong tendency to national unity told heavily against judicial inequality, and the barbarous injustice of the foreign system became too apparent even for the baronage or the Church to uphold it. "Kebel's case," as a lawyer would term it, brought the matter to an issue at Bury St. Edmunds. In the opinion of his neighbours Kebel seems to have been guiltless of the robbery with which he had been charged; but he was "of the cellarer's fee," and subject to the feudal jurisdiction of his court. The duel went against him and he was hung just without the gates. The taunts of the townsmen woke the farmers to a sense of their wrong. "Had Kebel been a dweller within the borough," said the burgesses, "he would have got his acquittal from the oaths of his neighbours, as our liberty is." The scandal at last moved the convent itself to action. The monks were divided in opinion, but the saner part determined that their tenants "should enjoy equal liberty" with the townsmen.