In the dead hour of the middle watch he appeared on deck in his night-shirt, looked attentively at the log-board by the binnacle- light, and desired Pullings to shorten sail at eight bells. He appeared again, like a restless ghost, at five bells, and backed his topsails for a while. His calculations were remarkably exact, and he brought the frigate into Rio just as the sun rose behind her and bathed the whole fantastic spectacle in golden light. Yet even this did not answer: even this did not close the breach.
Stephen, on being routed out of bed to behold it, observed ‘that it was curious how vulgar Nature could be at times – meretricious, ad captandum vulgus effects – very much the kind of thing attempted to be accomplished at Astley’s or Ranelagh, and fortunately missed of.’
-H.M.S. Surprise, Patrick O'Brian
(The context of this, of course, is that Stephen is angry because Jack got his sloth drunk)