We dropped the gun with a thump at a spot where the bulging curve of the stern swelled directly under the muzzle. I grabbed at the trigger just as a new surge of movement brought the flier perilously close to a great, inrushing wall of water which was not water. Koto's face was drawn, and Virginia Crane was staring in horrified fascination at the gun.

Again came the faint trembling of the beautifully constructed mechanism. The green ray leaped out across the blinding whiteness of our light rays. I jammed the muzzle down until the whole force of the atomic stream was spouting against the magnetic plate which held the cable to our stern.

"Look, Doctor! Look!" Captain Crane cried.

But I was already looking.

For an instant a flash of blue light played about our ship. There was a single sharp, crackling sound; and, ringing in the night, an echoing, high-pitched twang.

Koto let out a shout. I took my hands away from the gun.

Backward the twanging cable snapped, demolishing with one touch a score of the clustering Orconites. Into the waves it snapped, and our ship, ceasing to move, came to rest upon the glittering pebbles of the beach.

I heaved a deep sigh.

"What came to me a moment ago," I said breathlessly to the others, "was the idea that when atomic structures are so juggled that they are no longer affected by the gun, all the forces of magnetism, which usually are immune to the atomic stream, are rendered liable to disruption by it. We could not destroy Leider's cable, but we could play the deuce with its magnetic grip on us."

Koto was looking at me wide-eyed, and I saw that his interest was as keen as my own. Even Virginia Crane, scientist though she was not, was interested.