"I'll follow along the river," he reasoned. "It may lead me somewhere and it will show the way back to the plane. I may come across something in the way of a clue. Can't go exploring by air, or I'll burn up all the gas and be stranded here!"
To his surprise, the water course proved to be an ancient canal, walled with crumbling masonry. Its channel was choked with mud and thorny, thick-leaved desert shrubs of unfamiliar variety; but a feeble current still flowed along it.
After some reflection, Larry set out along the banks of the canal.
He followed it for two days.
Curious straight bars of light were visible across the sky—a band of violet in the morning; one of crimson at evening. Their apparent motion was in the same direction as that of the sun. The bars of light puzzled him considerably before it occurred to him that they must be the red and violet rays.
"So you wait till evening, and then fly up into the red ray, to go home," he muttered. "But I may not need that information," he added grimly. "Seems to be a pretty big job to search a planet on foot, for one person. And I'm not going back without Agnes!"
In the afternoon of the second day, he came within view of a city. He could discern vast, imposing walls and towers of dark stone. It stood in the barren red desert, far back from the green line of the old canal. Larry left the canal and started wearily across toward it. He had covered several miles of the distance before he saw that the lofty towers were falling, the magnificent walls crumbling. The city was ruined, dead, deserted!
The realization brought him a great flood of despair. He had hoped to find people—friends, from whom he might get food, and information about this unfamiliar planet. But the city was dead.
Larry was standing there, in the midst of the vast red plain between ruined city and ruined canal. Tired, hungry, lonely and hopeless. He was looking up at the white "sun," trying to comfort himself with the thought that the brilliant luminary was merely a queer blue lamp, that he was upon a tiny experimental world in a laboratory. But the thought brought him no relief; only confusion and a sense of incredulity.