“Thank you for joining me,” he smiled. “Now I have you where I want you.” He folded back his sleeve, revealing the leather gauntlet that held the braided wire with which he had strangled so many. It was Bell’s first close look at it, and he saw a lead weight on the end of the cable. Semmler straightened his arm suddenly, and the weight drew six feet of wire from its spool and wrapped it around one of the steel stays stiffening the funnel top.

Bell lunged suddenly and reached for the man’s foot.

The Acrobat moved just as swiftly, eluding Bell’s grasp and launching himself off the ladder to the other side of the ventilator shaft, where he hooked an elbow over the rim and smiled down on Bell.

“The man who falls two hundred and twenty feet to the bottom of the ship will not be the man who learned to fly in the circus.”

With that, Semmler used his elbow to flip over the rim and disappear.

Bell climbed to the top of the ladder and jumped across the ventilator. He caught the rim with both hands, pulled himself over the top, and peered down through hot smoke into the soot-blackened uptake that exhausted No. 4 boiler room’s furnaces. As it shared the funnel with the ventilator they had climbed up, it was only ten feet in diameter.

Semmler crouched with bird-like grace on a foothold several feet down.

“Now when you fall,” he taunted, “you will fall into the furnace.”

Bell surveyed Semmler’s new position. The foothold, a steel shelf less than a foot deep, circled the entire uptake. There were handholds welded just beneath the top rim, and Semmler’s eyes blazed again as he chose his next landing. The cable shot from his gauntlet, snagged a handhold, and the Acrobat flew, while launching a deadly kick at Bell’s head.

Isaac Bell jumped at the same time, landed beside him on the foothold, grabbed the nearest handhold, and punched Semmler in the stomach as hard as he could, staggering the man. “I was in the circus, too.”

But he had not reckoned with Semmler’s superhuman speed, nor his capacity to shrug off pain. In a move too quick to anticipate, Semmler flipped the cable off the rung and around Isaac Bell’s neck.

Bell drove punch after punch into Semmler’s torso, but even the hardest blow did nothing to relieve the pressure that was suddenly cutting blood and air from his brain. White lights stormed before his eyes, and he felt his strength ebb. A roar in his ears smothered the pounding of his heart. Gripping a handhold with the remaining strength in his left hand, he rammed Semmler with his knee, and the German slipped from the foothold. The only thing that kept him from falling was the wire stretched between his wrist and Isaac Bell’s neck.