E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
now called Portsoken Ward. King Edgar gave it to thirteen knights on the following conditions:(1) Each knight was to be victorious in three combatsone aboveground, one underground, and one in the water; and (2) each knight was, on a given day, to run with spears against all comers in East Smithfield. William the Conqueror confirmed the same unto the heirs of these knights. Henry I. gave it to the canons of Holy Trinity, and acquitted it of all service.