In the schedules of boundaries appended to two Old English charters there occurs mention of pools called " Grendel's mere," one in Wiltshire and the other in Staffordshire.
Haunting buildings and famous ruins, gliding around pools, walls and trees, mysteriously disappearing below ground, the serpent and all its kind invariably arrested attention through its uncanny distinctiveness from bird or beast.
They are mostly bordered by dense vegetation; in the dry season water is found in pools in the river beds or can be obtained by digging.
Such are the aqueducts, of which remains exist at Jericho, Caesarea and other places east and west of the Jordan; but especially must be mentioned the enormous reservoirs known as Solomon's Pools, in a valley between Jerusalem and Hebron, by which the former city was supplied with water through an elaborate system of conduits.
The lakes vary in size from mere pools to sheets of water several square miles in area.