... the Castellan in time of war, he had rights hardly less important in time of peace. Here it should be premised that under Norman rule the King's justice or the King's peace was assured by the grant of soke and soken—the former being the power of hearing and determining causes and levying fines and forfeitures, and the latter the area within which soke and other privileges were exercised. In the City of London the Fitzwalters had a soken extending ... — The Customs of Old England • F. J. Snell