"I ask you not to do this," she was saying. "You will succeed; I read it in your face. Let me go with you; let me share in the adventure. I am begging this of you. It is your turn to be generous."
Harkness' hand upon the metal ball held it motionless within its enclosing cage. From astern there came to him the muffled roar of a blast that drove them on and out into space—black, velvety space, thick-studded with sharp points of light.... He stared into that wondrous night, then back into the eyes that looked steadily, unfathomably, into his.... And his hand was unresisting as the strong, slender fingers about his wrist drew it back....
They were off for the Dark Moon: their journey, truly, was begun. And this girl, whom he had told himself to forget, was going with them. There was much that he did not understand, but he knew that he was glad with a gladness that transcended all previous thrills of the perilous plan.
CHAPTER V
The "Dark Moon"
hey were seated in the cabin of the man-made meteor that the brain of Harkness had conceived—two men and a girl. And they stared at one another unsmilingly, with eyes which reflected their comprehension of the risks that they ran and the dangers which lay ahead in the dark void. Yet the brown eyes of Mam'selle Diane, no less than the others, were afire with the thrill of adventure—the same response to the same lure that has carried men to each new exploration—or to their death.
Behind them, a rear lookout port framed a picture of awful majesty. The earth was a great disc, faintly luminous in a curtain of dead black. From beyond it, a hidden sun made glorious flame of the disc's entire rim. And, streaming toward it, a straight, blasting line from their stern exhaust, was an arrow of blue.
It had taken form slowly, that arrow of blue fire, and Harkness answered an unspoken question from the girl.
"Hydrogen and oxygen," he explained. "It is an explosive mixture at this height, but too thin to take fire. It will pass. Beyond this is pure hydrogen. And then, nothing."