Read it through once

My iron shroud contracted round me; persuasion advanced with slow sure step. Shut my eyes as I would, these last words of his succeeded in making the way, which had seemed blocked up, comparatively clear. My work, which had appeared so vague, so hopelessly diffuse, condensed itself as he proceeded, and assumed a definite form under his shaping hand. He waited for an answer. I demanded a quarter of an hour to think, before I again hazarded a reply.