INTRODUCTION. 7 of the mountains of North Wales or Scotland. Neither can the South Down Sheep, with all their excellence, supplant either those of the mountainous parts of the kingdom or of the marshes of Romney. Youatt says: "In all the different districts of the kingdom, we find various breeds of sheep [and, he might have added, cattle] beautifully adapted to the locality which they occupy. No one knows their origin : they are indigenous to the soil, climate, and pasturage, the locality on which they graze : they seem to have been formed by it and for it." This is very true, and it would seem that less has been done by the agriculturist than by nature. In consequence of the large growth of cereals in Essex, and the absence of hills and wastes, it has not been found profitable to keep, for any great number of years, any strain of animals in any particular district. The result has been, therefore, that natural effects and environments have not had sufficient time to produce those modifications in the race which result in the establishment of a localised race or breed. It is to the constant changes in the numbers of the stock on our corn lands, and to insufficient facilities for rearing young stock, less than to the lack of skill and enterprise amongst our agriculturists, that we may attribute the non-localisation of a special breed of cattle The large estuaries of Essex, to which allusion has