Leonardo's mouth actually dropped open, blue eyes wide, because he could not possibly mean such a generous gift! "That is very kind, but I would hate to take so much from you. I have nothing to trade for." He didn't technically own the clothes on his back at the moment, so that was out. He looked so excitedly at the paper though, at what it could mean. But what would he use it for? He couldn't use it frivolously. Only on useful sketches.

"Ah, you are an architect!" The reams, the ruler, the drafting papers, he flashed a very bright smile. "And what are you drafting?"