16 JANUARY 1948, Page 18


THE Chiltern hills and downs, lovely in themselves and a stance for many lovely views, are underlaid by reservoirs of water that feed a number of little rivers, of which the most important is the Lea, or Lee as the Commissioners prefer to spell it. There is a constant fear that this water table is falling, and from time to time upper reaches of several of the streams go bone dry. Any failure of the supply further increases the deadliness of pollution, which still prevails especially in the Lea, from which so much of London's water supply is drawn. Local natural history societies are being asked (by the Department of Geography at Cambridge) to give statistical help by reporting the beginning and end of the flow in the " bournes " and the varying depth of wells anywhere in the neighbourhood of the Chilterns.