In the economy of Scottish agriculture, the two mountain breeds of sheep, the Blackface and the Cheviot, play a most important part. Not only do they convert the rough herbage of the hills into wool and store sheep for fattening, but they also provide low country farmers with these handsome Crossbred ewes that are to be found everywhere, and which in their turn produce the heavyweight fattening sheep favoured by crop-growing farmers for the double purpose of converting aftermath, grass and roots into mutton and of maintaining the fertility of their soils.