roast-mutton of England ought to be more than rivaled among us; for we have a better climate and far better sheep-walks than the English in the rugged mountain districts of New-England, of Pennsylvania, and of our own State. The breeding of large, fine-fleshed sheep of the choicest varieties, on the lines of all the railroads communicating with the great cities, is one of the undertakings which promise largest and surest returns to our farmers, and it is yet in its infancy. A hundred thousand of such sheep would be taken annually by New-York and Philadelphia at largely remunerating prices. Thousands of acres of sterile, scantily timbered land on the Delaware and its branches might be profitably transformed into extensive sheep-walks, while they must otherwise remain useless and unimproved for ages. These lands may now be bought for a song, and are morally certain to be far higher within the next dozen years. [Illustration: LONG-WOOLED SHEEP. _Best long-wooled buck and ewe over two years old: owned by J. McDonald and Wm. Rathbone._] Of Swine there were a good many exhibited at the Fair, but we did not waste much time upon them. The Hog Crop once stood high among the products of the older States, but it has gradually fallen off since the settlement of the great West, and the cheapening of intercommunication between that section and the East, and is destined to sink still lower. Pork can be made on the prairies and among the nutwood forests and corn-bearing intervales of the West for half the cost of making it in New-England; no Yankee can afford to feed his hogs with corn, much less potatoes, as his grandfather freely did. Only on a dairy farm can any considerable quantity of pork be profitably made east of the Ohio; and he who keeps but a pig or two to eat up the refuse of the kitchen cares little (perhaps too little) for the breed of his porkers. So let them pass.