On the horizon lay the immobile cloud which capped the incredible waterspouts known as the Pillars of Hawaii.

Captain Blake lowered his binoculars. "There they stand, gentlemen."

In addition to the naval personnel of the watch, the bridge of the hydrographic survey ship U. S. S. Mahan held two civilians; the captain's words were addressed to them. The elder and smaller of the pair peered intently through a spyglass he had borrowed from the quartermaster. "I can't make them out," he complained.

"Here—try my glasses, doctor," Blake suggested, passing over his binoculars. He turned to the officer of the deck and added, "Have the forward range finder manned, if you please, Mr. Mott." Lieutenant Mott caught the eye of the bos'n's mate of the watch, listening from a discreet distance, and jerked a thumb upward. The petty officer stepped to the microphone, piped a shrill stand-by, and the metallic voice of the loud-speaker filled the ship, drowning out the next words of the captain: "Raaaaange one! Maaaaaaaan and cast loose!"

"I asked," the captain repeated, "if that was any better."

"I think I see them," Jacobson Graves acknowledged. "Two dark vertical stripes, from the cloud to the horizon."

"That's it."

The other civilian, Bill Eisenberg, had taken the telescope when Graves had surrendered it for the binoculars. "I got 'em too," he announced. "There's nothing wrong with this 'scope, Doc. But they don't look as big as I had expected," he admitted.

"They are still beyond the horizon," Blake explained. "You see only the upper segments. But they stand just under eleven thousand feet from water line to cloud-if they are still running true to form."

Graves looked up quickly. "Why the mental reservation? Haven't they been?"

Captain Blake shrugged. "Sure. Right on the nose. But they ought not to be there at all-four months ago they did not exist. How do I know what they will be doing today-or tomorrow?"

Graves nodded. "I see your point-and agree with it. Can we estimate their height from the distance?"

"I'll see." Blake stuck his head into the charthouse. "Any reading, Archie?"

"Just a second, captain." The navigator stuck his face against a voice tube and called out, "Range!"

A muffled voice replied, "Range one-no reading."

"Something greater than twenty miles," Blake told Graves cheerfully. "You'll have to wait, doctor."

Lieutenant Mott directed the quartermaster to make three bells; the captain left the bridge, leaving word that he was to be informed when the ship approached the critical limit of three miles from the Pillars. Somewhat reluctantly, Graves and Eisenberg followed him down; they had barely time enough to dress before dining with the captain.

Captain Blake's manners were old-fashioned; he did not permit the conversation to turn to shop talk until the dinner had reached the coffee and cigars stage. "Well, gentlemen," he began, as he lit up, "just what is it you propose to do?

"Didn't the Navy Department tell you?" Graves asked with a quick look.

"Not much. I have had one letter, directing me to place my ship and command at your disposal for research concerning the Pillars, and a dispatch two days ago telling me to take you aboard this morning. No details."

Graves looked nervously at Eisenberg, then back to the captain. He cleared his throat. "Uh-we propose, captain, to go up the Kanaka column and down the Wahini."

Blake gave him a sharp look, started to speak, reconsidered, and started again. "Doctor-you'll forgive me, I hope; I don't mean to be rude-but that sounds utterly crazy. A fancy way to commit suicide."

"It may be a little dangerous-"

"Hummph!"

"-but we have the means to accomplish it, if, as we believe to be true, the Kanaka column supplies the water which becomes the Wahini column on the return trip." He outlined the method. He and Eisenberg totaled between them nearly twenty-five years of bathysphere experience, eight for Eisenberg, seventeen for himself. They had brought aboard the Mahan, at present in an uncouth crate on the fantail, a modified bathysphere. Externally it was a bathysphere with its anchor weights removed; internally it much more nearly resembled some of the complicated barrels in which foolhardy exhibitionists have essayed the spectacular, useless trip over Niagara Falls. It would supply air, stuffy but breathable, for forty-eight hours; it held water and concentrated food for at least that period; there were even rude but adequate sanitary arrangements.

But its principal feature was an anti-shock harness, a glorified corset, a strait jacket, in which a man could hang suspended clear of the walls by means of a network of Gideon cord and steel springs. In it, a man might reasonably hope to survive most violent pummeling. He could perhaps be shot from a cannon, bounced down a hillside, subjected to the sadistic mercy of a baggage smasher, and still survive with bones intact and viscera unruptured.

Blake poked a finger at a line sketch with which Graves had illustrated his description. "You actually intend to try to ascend the Pillars in that?"

Eisenberg replied. "Not him, captain. Me."

Graves reddened. "My damned doctor-"

"And your colleagues," Eisenberg added. "It's this way, captain: There's nothing wrong with Doc's nerve, but he has a leaky heart, a pair of submarine ears, and a set of not-so-good arteries. So the Institute has delegated me to kinda watch over him."

"Now look here," Graves protested, "Bill, you're not going to be stuffy about this. I'm an old man; I'll never have another such chance."

"No go," Eisenberg denied. "Captain, I wish to inform you that the Institute vested title of record to that gear we brought aboard in me, just to keep the old war horse from doing anything foolish."

"That's your pidgin," Blake answered testily. "My instructions are to facilitate Dr. Graves' research. Assuming that one or the other of you wish to commit suicide in that steel coffin, how do you propose to enter the Kanaka Pillar?"

"Why, that's your job, captain. You put the sphere into the up column and pick it up again when it comes down the down column."

Blake pursed his lips, then slowly shook his head. "I can't do that."

"Huh? Why not?"

"I will not take my ship closer than three miles to the Pillars. The Mahan is a sound ship, but she is not built for speed. She can't make more than twelve knots. Some place inside that circle the surface current which feeds the Kanaka column will exceed twelve knots. I don't care to find out where, by losing my ship.

"There have been an unprecedented number of unreported fishing vessels out of the islands lately. I don't care to have the Mahan listed."

"You think they went up the column?"

"I do."

"But, look, captain," suggested Bill Eisenberg, "you wouldn't have to risk the ship. You could launch the sphere from a power boat."

Blake shook his head. "Out of the question," he said grimly. "Even if the ship's boats were built for the job, which they aren't, I will not risk naval personnel. This isn't war."

"I wonder," said Graves softly.

"What's that?"

Eisenberg chuckled. "Doc has a romantic notion that all the odd phenomena turned up in the past few years can be hooked together into one smooth theory with a single, sinister cause-everything from the Pillars to LaGrange's fireballs."

"LaGrange's fireballs? How could there be any connection there? They are simply static electricity, allee samee heat lightning. I know; I've seen 'em."

The scientists were at once attentive, Graves' pique and Eisenberg's amusement alike buried in truth-tropism. "You did? When? Where?"