In sheep the tendency to early maturity and to fatten is greatly influenced by the breed. The Leicester, even when kept on inferior pasture, fattens so rapidly that in eighteen months it is fit for the butcher; whilst the Merino, though supplied with excellent herbage, must be preserved for nearly four years before it is ready for the shambles. The crossing of good herds has resulted in the development of numerous varieties, all remarkable for their aptitude to fatten and to arrive early at maturity. The Leicester--itself supposed to be a cross--has greatly improved the Lincoln, and the Hampshire and Southdown have produced an excellent cross. Of course, each breed and cross has its admirers; indeed, the differences of opinion which prevail in relation to the relative merits of the Lincoln and the Leicester--the Southdown and the Shropshiredown--the Dorset and the Somerset--occasionally culminate into newspaper controversies of an exceedingly ascerb character. There is no doubt but that particular breeds of sheep thrive in localities and under conditions which are inimical to other varieties; but still it is equally evident that, _cæteris paribus_, one kind of sheep will store up in its increase a larger proportion of its food than another kind, and will arrive earlier at maturity. It is the knowledge of this fact which has led to the great estimation in which are held some half-dozen out of the numerous breeds and cross-breeds of that animal. In 1861 an interesting experiment was made by the Parlington Farmers' Club with the object of testing the relative merits of several varieties of sheep. The results are shown in the tables:-- TABLE I.