 Still, it was undoubtedly the custom for some hundreds of years before this to burn lights before relics and shrines as a mark of honor the candles burnt by King Alfred the Great before his relics, and used by him to measure the hours, are a famous example—and it may be that this custom generally extended to the place where the Blessed Sacrament was reserved.The constant association of lights with the Holy Grail in the Grail romances is suggestive of this.The great movement for providing a perpetual lamp before the altar must undoubtedly be traced to the preaching in France and England of a certain Eustace, Abbot of (?