Beacon Turrets occur at Llandrillo-yn-Rhos, at St. Burian's, Hadley, and St. Michael's Mount, under the modern name of St. Michael's Chair; they carried a light in a pot suspended on an iron frame, to guide travellers or ships. The cage for the cresset remainis at Hadley Tower. Octagonal lanterns are found at. Boston, in the west tower of Ely, at All Saints', York, and other places which served the same purpose. St. Hilary Tower was yearly whitewashed by the port of St. Ives, to render it conspicuous at sea. At Bow Church, Cheapside, and Winchester, there were beacons.