As they walked back toward the ship the strange lights seemed to be dying out. At first they hardly noticed this, but as they continued on it became quite gloomy, and an odd sort of gloom it was too, first green, then yellow, then red and then blue.
“I believe whatever serves as a sun down here is setting,” the professor observed. “We must hurry. I don’t want to be caught out here after dark.”
They hurried on, the lights dying out more and more, until, as they came in sight of their ship, it was so black they could hardly see.
Mark who was in the rear turned around, glancing behind him. As he did so he caught sight of a gigantic shadow moving along on top of the nearest hill. The shadow was not unlike that of a man in shape, but of such gigantic stature that Mark knew it could be like no human being he had ever seen. At the same time it bore a curious resemblance to the weird shadow he had seen slip into the Mermaid that night before they sailed.
“I wonder if it can be the same—the same thing—grown larger, just as the peach grows larger than those in our world,” Mark thought, while a shiver of fear seemed to go over him. “I wonder if that—that thing could have been on the ship——”
Then the last rays of light died away and there was total darkness.
CHAPTER XX
OVERHAULING THE SHIP
“Keep together!” shouted the professor. “It will not do to become lost now. We are close to the ship, and will soon be there. Come after me.”
It was more by following the sound of the scientist’s voice, than by any sight which the others could get of him, that they managed to trail along behind. They reached the ship in safety, however, and entered. There was no sound as of beasts or insects within, and, though Mark felt a little apprehensive on account of what he had seen, he and the others as well, were glad to be again in something that seemed like home.
“I wish we had some candles, or some sort of a light to see by,” the professor remarked. “We can do nothing in the dark, and there is no telling how long this night is going to last once it has set in. If I could have a little illumination, I might be able to fix the dynamo, and then we could turn on the incandescents. That portable light we had is broken.”