278 THE ESSEX NATURALIST. distance would speak of it—if, indeed, they ever spoke of it at all—as "So-and-So's River." There would have been no Ordnance Surveyors calling on him periodically and demanding to know its proper name, so that they might enter it on their official maps. Furthermore, river-names are not localized in the way ordinary place-names are. Thus, people living beside a river at one part of its course often call it by a name totally different from that by which other people living on it at another part of its course call it. This tendency continues to exist, as will be seen, even at the present day. Thus it was that only our larger rivers, known to many people over a wide area, ever received or required definite names. Even to-day, most of our smaller streams still have no names, properly so called. They are spoken of (and even indicated on the maps of the Ordnance Survey) by what I have styled "descriptive epithets," derived either from the name of the parish in which they rise or through which they chiefly flow, or from the name of some owner of land on their banks, or from some adjacent place. Such descriptive epithets do not develop into names, properly so called, until they have ceased to have an obvious descriptive meaning in current language. Many of our smaller rivulets are still known, therefore, by such descriptive epithets as "So-and-So's Brook "or the "Such-and-Such Water"—the latter specially in the chalk-area round Saffron Walden. Thus, we have, among other small rivulets which are just large enough to have become known by such descriptive epithets and to be designated thereby on the maps of the Ordnance Survey, the following eighteen3:— The Belchamp Brook (5 miles), flowing through Belchamp Walter, Borley, and Bulmer, into the Stour; The Cambridge Brook (4 miles), flowing through Mount Bures into the Stour; Clavering Water (2 miles), flowing through Clavering into the Stort; Cobbin's Brook (6 miles), flowing through Cobbin's Farm (Epping) and Waltham Abbey into the Lea; The Cripsey Brook (7 miles), flowing through North Weald, Moreton, and Chipping Ongar into the Roding; Debden Water (3 miles), flowing through Debden and New- port into the Cam; 3 Their lengths and courses, as given, are approximate only. Several of them arc named on Chapman and Andre's Map of 1777.