developed it—a brain that may be greater than I suspect." His face grew suddenly graver.
At little later Northwood said: "It seems that we must be making fabulous speed."
"Perhaps!" Dr. Mundson worked with the controls. "Here, I've cut her down to the average speed of the ordinary airplane. Now you can see a bit of the night scenery."
Northwood peeped out the thick glass porthole. Far below, he saw two tiny streaks of light, one smooth and stationery, the other wavering as though it were a reflection in water.
"That can't be a lighthouse!" he cried.
The scientist glanced out. "It is. We're approaching the Florida Keys."
"Impossible! We've been traveling less than an hour."
"But, my young friend, do you realize that my sun-ship has a speed of over one thousand miles an hour, how much over I dare not tell you?"
Throughout the night, Northwood sat beside Dr. Mundson, watching his deft fingers control the simple-looking buttons and levers. So fast was their flight now that, through the portholes, sky and earth looked the same: dark gray films of emptiness. The continuous weird whistle from the hidden mechanism of the sun-ship was like the drone of a monster insect, monotonous and soporific during the long intervals when the scientist was too busy with his controls to engage in conversation.
For some reason that he could not explain, Northwood had an aversion to going into the sleeping apartment behind the control room. Then, towards morning, when the suddenly falling temperature struck a biting chill throughout the sun ship, Northwood, going into the cabin for fur coats, discovered why his mind and body shrank in horror from the cabin.
AFTER he had procured the fur coats from a closet, he paused a moment, in the privacy of the cabin, to look at Athalia's picture. Every nerve in his body leaped to meet the magnetism of her beautiful eyes. Never had Mary Burns stirred emotion like this in him. He hung over Mary's picture, wistfully, hoping almost prayerfully that he could react to her as he did to Athalia; but her pale, over-intellectual face left him cold.
"Cad!" he ground out between his teeth. "Forgetting her so soon!"
The two pictures were lying side by side on a little table. Suddenly an obscure noise in the room caught his attention. It was more vibration than noise, for small sounds could scarcely be heard above the whistle of the sun-ship. A slight compression of the air against his neck gave him the eery feeling that someone was standing close behind him. He wheeled and looked over his shoulder. Half ashamed of his startled gesture, he again turned to his pictures. Then a sharp cry broke from him.
Athania's picture was gone.
He searched for it everywhere in the room, in his own pockets, under the furniture. It was nowhere to be found.
In sudden, overpowering horror, he seized the fur coats and returned to the control room.
DR. MUNDSON was changing the speed.
"Look out the window!" he called to Northwood.
The young man looked and started violently. Day had come, and now that the sun-ship was flying at a moderate speed, the ocean beneath was plainly visible; and its entire surface was covered with broken floes of ice and small, ragged icebergs. He seized a telescope and focusd it below. A typical polar scene met his eyes: penguins strutted about on cakes of ice, a whale blowing in the icy water.
"A part of the Antarctic that has never been explored," said Dr. Mundson; "and there, just showing on the horizon, is the Great Ice Barrier." His characteristic smile lighted the morose
