And then began the most extraordinary hunt of invisibility I can ever conceive.

He went fast even at the beginning, and, of course, it was perfectly obvious that he was following something. To judge by the poise of his head he kept his eyes steadily at a certain level⁠—just above the height of a man⁠—and the consequence was he stumbled a good deal over the roughness of the ground. The hissing sound had stopped. There was no sound of any kind, and what he saw to follow was utterly beyond me. I only know, that in mortal dread of being left behind, and with a biting curiosity to see whatever there was to be seen, I followed as quickly as I could, and even then barely succeeded in keeping up with him.