Sailing toward dawn, and I was perched atop the crow's nest, being the ship's eyes. We were two nights out of Sydney, and there'd been no weather to speak of so far. I was keeping watch on a dark stack of nimbus clouds off to the northwest, but we were leaving it far behind, and it looked to be smooth going all the way back to Lionsgate City. Like riding a cloud. . . . Matt Cruse is a cabin boy on the Aurora, a huge airship that sails hundreds of...