Precedent on board ship is not easily to be broken, and much depends on the personality of the Captain. If he has dipped into little-known places all over the world with which you are familiar, or if you show appreciation of a Captain's point of view, the battle is won. A few remarks about the difficulty of navigation of Nippon's Inland Sea, a rebuke of some thoughtless idiot at table who hopes for a storm; such things soon draw forth casual inquiries on his side, and when a Captain begins to ask questions, the freedom of the chart-room is yours, and your unheard-of requests which only a naturalist could invent or desire, will not fail of fulfilment. I am off on a voyage of two weeks to British Guiana and I begin to ponder the solution of my first problem. The vessel plows along at a ten-knot rate, through waters teeming with interesting life and stopping at islands where every moment ashore is of thrilling scientific possibility. By what means can I achieve the impossible and study the life of this great ocean as we slip rapidly through it--an ocean so all-encompassing, yet to a passenger, so inaccessible. Day after day I scan the surface for momentary glimpses of cetaceans, and the air for passing sea birds. Even the rigging, at certain seasons, is worth watching as a resting place for migrating birds. The extreme bow is one of the best points of vantage, but the spot of all spots for an observer is the appropriately named crow's nest, high up on the foremast. You have indeed won the Captain over to your bizarre activities when he accords permission to climb the swaying ratlines and heave yourself into that wonderful place. It is tame enough when compared with piloting a plane among the clouds, but it presents an enormous expanse of ocean compared with the humble deck view. Here you can follow the small whales or blackfish down and down long after they have sounded; with your binoculars you can see every detail of the great floating turtles. And when the sun sinks in glory which is terrible in its grandeur, you may let it fill your senses with wordless ecstasy, without fear of interpretive interruption. Save for the other matchstick mast and the spider-web ratlines, the horizon is unbroken. Many years ago I spent a night in the torch of the Statue of Liberty and each time I dozed, the twenty odd inch arch through which the lofty structure swayed, awoke me again and again, being changed, behind one's closed lids, into a single motion, apparently that of a gradually accelerated fall to earth. In the crow's nest, when the ship is rolling, I can often conjure up the same feeling when my eyes are shut, but now I react to a new stimulus and instinctively reach for a steering rod, as the sensation is that of a wing slip, consequent upon too slow progress of an aeroplane.