Midday came, and still he was upon the water. By this time he had reached a great patch of glassy calm, covered with black masses of guillemots and shearwaters, over which the great gulls sailed and the small terns hovered and screamed. As the boat crept in among them, no bird was disturbed; he might almost have reached them with his hand. He leant over the boat's side, and suddenly, like a lightning flash, he saw the innumerable legions of the herring pass, followed closely by the dark shadows of the predatory fishes, from the lesser dog-fish to the non-tropical shark.