Qumron

One of the Qumron caves where the Essenes saved the Dead Sea scrolls. When the ink was analyzed only 15% included water to make the ink from the Dead Sea. The rest were transcriptions brought along when they left Jerusalem. 

Some had said that Isaiah must have been written some time after Jesus lived because otherwise how could he have fulfilled the prophesy? But finding the scrolls in these caves and dating them to well before Jesus lived showed definitively that Jesus lived centuries after Isaiah was written. This fulfilled prophecy was not manufactured.