"I don't like the feel of this, Napoleon. It's all too easy."

Solo felt his uniform pocket to make certain he'd brought the plastic box of explosive gelcaps. The light for level P-2 went out. The one for P-1 lit. With a gentle whir, the cage stopped and the doors opened.

Illya Kuryakin thumbed the Door Open stud, held it. Both U.N.C.L.E. agents gaped.

High over their heads soared an arched ceiling carved and blasted from the green-shot gray stone of the Cornish cliffs. This roof was braced in strategic places by towering steel beams of a bright rust-red finish. The footings of the steel super-structure were set in thick concrete which stretched away before them, forming a huge T shaped platform.

As they edged out of the elevator, the two U.N.C.L.E. agents were in a position approximately at the center of the crossbar of the T. Ahead, like a pier, the stem of the T stretched out into a huge natural basin filled with quietly lapping dark water. On their left alongside this pier, moored down with a dozen foot-thick lines, rode the most bizarre seacraft they had ever seen.

"I think," Napoleon Solo softly said, "we've discovered the white whale."

The incredible low-slung metal craft was painted a very light shade of gray. Only in barest outline did it resemble a conventional submarine. Its length was three to four times that of an ordinary sub. Its conning tower was little more than a streamlined blister rising about a foot or so above the dorsal surface.

Along the sides of the craft, from bow to stern, rows of large, oval viewports ran just above the waterline. The ports were made of dark green glass or some similar material, opaque and reflecting the shaded lights dangling from the rocky ceiling of the pen.

Catwalks and ladderways crisscrossed above them. Empty. The entire place was lifeless, soundless except for the whispering splash of water against the hull of the monster submarine. Far down past the sub's bow they saw a tall arched opening in the cave wall. The opening was barred by a thick steel grill which rose from the water. Beyond the grill, darkness. Solo was sure the far end of that black channel opened at sea.

He slipped the plastic box from his pocket. "Care to try a little harpooning?"

"I can think of more relaxing diversions," Illya replied under his breath. "Napoleon, this is too pat. They surely know we haven't left the castle—"

"I agree. But we've come this far and the odds are bad against getting out, so we should take the sub out of action while we can. Come on."

The agents walked quickly down the stone quay. Their borrowed boots clacked. Solo stuffed the gun in his leather belt, carefully opened the plastic box and removed one of the explosive gelcaps from its bed of special cushioning material. They were now at a point on the quay midway between bow and stern of the sub. Illya pointed at the dorsal blister.

"That hatch doesn't look secure," he said. "Shall we go aboard before we blow her?"

Solo shrugged, juggling the cap delicately in his palm. "With this much fat in the fire, a little more won't hurt."

They jumped across to the hull of the sub.

Illya Kuryakin knelt, slipped his fingers under the hatch, lifted. A moment later he pulled his head back from the hatch interior.

"There's a ladder down into some Sort of control room."

Solo signed for him to go ahead. Illya disappeared. Solo put a leg over, handicapped because he could only use his right hand. In his left he carried the highly sensitive capsule of explosive.

The gloom of the ladderway closed around him. Illya landed below with a light thump. Solo sent his right foot down to the next rung of the ladder. Suddenly he felt his sole skid, heard Illya's warning a fraction late: "Watch out for that third rung. There's a smear of oil or grease on—"

Solo's right foot slid off the rung. He grabbed for a rung above to check his fall. He was jerked up short. The violent pull made the fingers of his left hand open. The explosive capsule popped out into a high arc.

Hanging from the ladder, green with fear, Solo watched the capsule drop.

"Illya, catch it!" he choked out, watching the little football-shaped pill drop end over end, down and down with a kind of horrific slow-motion movement.

Illya jerked his head up, saw the falling capsule, extended his hands. The capsule sailed past his finger tips. Solo braced for the shattering explosion. He heard another thump, looked down.

Illya was lying on his spine, having tumbled himself underneath the capsule once he missed it. He'd shot up his right hand to catch the pellet just in time.

Solo felt his heart slow down from its frantic thudding pace. He dangled from the ladder, got his feet back on solid steel, completed his climb to the deck.

Tall panels of instruments covered the walls of the chamber, which was perhaps twenty feet long and half as wide. A highly futuristic-looking periscope device hung from over their heads. The instruments and dials equipment were baffling, indicating an advanced state of the art.

"Here," Illya said, cheeks slicked with sweat, "you hold the baby." He handed over the gelcap.

Solo jerked a thumb at the forward bulkhead. "Let's explore that way. I'm curious to see the rest of this floating nightmare."

"We shall be very happy to give you a guided tour, Mr. Solo. Welcome aboard."

The sepulchral voice drove fear like needles into Solo's belly. The voice echoed from all around them, issuing from several concealed stereo speakers. Abruptly, tiny lights on the instrument consoles began to flicker.

Underfoot Solo felt a tingling. The air filled with a low, powerful hum. Illya's eyes rounded with recognition:

"I recognize that voice, Napoleon. It belongs to Commander Ahab."

Even as Illya spoke, a section of bulkhead slid aside to reveal a forty-inch television screen on which glowed a picture whose sharp blacks and crisp whites indicated a live pickup. The screen showed a man with a spade beard seated in a sleekly modern chair. The man wore some kind of dark velveteen lounging coat. Behind him was an oval viewport against which water lapped gently.

Commander Victor Ahab looked out from the screen and said cheerfully, "We are delighted to have both you gentlemen aboard our vessel. The craft carries a THRUSH registration number, of course, but I prefer the name Moby Dick. A harmless little conceit. Incidentally, I am speaking to you from my personal command post forward. You will be brought here presently. First, however, I would appreciate it, Mr. Solo—so nice to meet you at long last—if you would hand the explosive device you are carrying to the crew member who is just now coming to take it from you.,,

The aft bulkhead opened with a whirring of motorized latches. A burly THRUSH seaman in a trim black blouse and trousers entered. Overhead, men ran on the deck- plates of the sub. The atmosphere of tension heightened.

Three other seamen followed the first into the compartment. Lights came on behind concealed brackets. The seaman in the lead watched Solo's right hand and kept his distance.

"No bravado, please, Solo," Commander Ahab boomed from the screen. "You could toss the pill and blow us all up, but you would be a member of the party. Escape is impossible. There is a powerful magnet under the deck on which you are standing. Special metal plates are built into the soles of the boots you so rudely stole from one of my men. This clever little device gives us perfect control of our crew. Submarines tend to grow unstable after long undersea voyages. Well, Solo? Why do you hesitate. Run!"