Jack glanced up, and there against the Southern Cross, high on the humming topgallant forestay, was the sloth, rocking easy with the rhythm of the ship. ‘I doubt you have too much starlight,’ he said. At this speed the frigate’s bow-wave rose high, washing the lee head-rails with an unearthly blue-green light and sending phosphorescent drops over them, even more brilliant than the wake that tore out straight behind them, a ruled line three miles long gleaming like a flow of metal.

