Jimbo began to feel uneasy. He had not lost his bearings, but he was a very long way from home, and quite beyond reach of the help he was so accustomed to. With a great effort he mounted several hundred feet into the air, and tried hard to stay there. For a short time he succeeded, but he soon felt himself sinking gradually downwards again. The force drawing him was a constant force without rise or fall; and with a deadly feeling of fear the boy began to realise that he would soon have to yield to it altogether. His heart beat faster and his thoughts turned to the friend who was then far away, but who alone could save him. She, at least, could have explained it and told him what best to do. But the governess was beyond his reach. This problem he must face alone. Something, however, had to be done quickly, and Jimbo, acting more as the man than as the boy, turned and flew hurriedly forward in another direction. He hoped this might somehow counteract the force that still drew him downwards; and for a time it apparently did so, and he flew level. But the strain increased every minute, and he looked down with something of a shudder as he realised that before very long he would be obliged to yield to this deadly force--and drop! It was then for the first time he noticed a change had come over the surface of the earth below. Instead of the patchwork of field and wood and road, he saw a vast cloud stretching out, white and smooth in the moonlight. The world was hidden beneath a snowy fog, dense and impenetrable. It was no longer even possible to tell in what direction he was flying, for there was nothing to steer by. This was a new and unexpected complication, and the boy could not understand how the change had come about so quickly; the last time he had glanced down for indications to steer by, everything had been clear and easily visible. It was very beautiful, this carpet of white mist with the silver moon shining upon it, but it thrilled him now with an unpleasant sense of dread. And, still more unpleasant, was a new sound which suddenly broke in upon the stillness and turned his blood into ice. He was certain that he heard wings behind him. He was being followed, and this meant that it was impossible to turn and fly back. There was nothing now to do but fly forwards and hope to distance the huge wings; but if he was being followed by the powerful flyer he had seen a few nights before, the boy knew that he stood little chance of success, and he only did it because it seemed the one thing possible. The cloud was dense and chill as he entered it; its moisture clung to his wings and made them heavy; his muscles seemed to stiffen, and motion became more and more difficult. The wings behind him meanwhile came closer.