A Rochester correspondent sends us a sample of this - one of the hybrids raised some years ago by Jacob Moore. The bunch weighed five ounces, and though the quality was very good, we had our doubts about its being superior in any considerable degree to the many good white varieties now known. But when we saw the date of the letter, Sept. 16, which is very early for Rochester, and remember that we have no very early white grape, we are inclined to think this will prove a valuable addition to a list already large.