From an examination of the leaves of your Vines we cannot discover symptoms to account for their coming so suddenly to a standstill and ripening their wood so very prematurely as you describe. Evidently, however, they must have got some sudden check, and the Hamburgs - being less robust in constitution than Alicante - have suffered most. Did you introduce any Vines among the old ones when you replanted? The roots and border being in such good condition would indicate that the cause was not there. But seeing the bad state you found them in, and considering the judicious course you have taken with them, they may ripen their crop and do better next year.