We crossed the ravine down which smoked the stream of hot water, and followed the winding pathway through the canebrakes until we reached a wide area covered over with a thick, powdery yellow substance which I believe was sulphur. Above the shoulder of a weedy bank the sea glittered. We came to a kind of shallow natural amphitheatre, and here the four of us halted. Then Moreau sounded the horn, and broke the sleeping stillness of the tropical afternoon. He must have had strong lungs. The hooting note rose and rose amidst its echoes, to at last an ear-penetrating intensity.

“Ah!” said Moreau, letting the curved instrument fall to his side again.