In the Thames Valley there are two very distinguished breeds of sheep - the Cotswolds at the head of the watershed, and the Oxford Downs, near Wallingford. Wallingford lamb is supposed to be the best in the market. There are also the Berkshire Downs sheep, but these are, I think, more obviously cross-bred, or else of the Hampshire breed. The Cotswold sheep are probably a very old breed. They are evidently the original of the woolly "baa-lamb" of the nursery, with long, fleecy wool. The Oxford Downs are a short-woolled sheep.