Read it through once

It was long before we found out the secret of this conversation, but we know it now, and all the world knows it. That part of the talk was like this—as one may read in all histories. The perplexed King asked Joan for a sign. He wanted to believe in her and her mission, and that her Voices were supernatural and endowed with knowledge hidden from mortals, but how could he do this unless these Voices could prove their claim in some absolutely unassailable way? It was then that Joan said: