“It’s gone up and down. I saw the periscope a moment ago. There!”

The stubby conning tower broke the surface. The hull itself emerged briefly and rolled back under.

“Tide’s battering him,” muttered Falconer. “It’s ebbing under a full moon.”

“Good,” said Bell. “We need all the help we can get.”

Dyname streaked through the patch of roiled water. The submarine was nowhere to be seen. Falconer tugged at Bell’s sleeve, whispering urgently, “He’s some sort of A-Class Royal Navy Holland—triple our tonnage. Look out, if he surfaces. He’ll be faster on his main engine.” With that warning, the captain slid unconscious to the deck. Bell throttled back and turned the speeding yacht around until it was pointing upstream again. He was several hundred yards beyond the Brooklyn Bridge now, scanning the water in the failing light.

A ferryboat pulled abruptly from its Pine Street Pier, cut off a big Bronx-bound Pennsylvania Railroad ferry, and raced up the East River. Their wakes combined to render vast stretches of water too choppy for Bell to distinguish the periscope from breaking seas. He drove into the chop and circled. Suddenly he saw it far ahead. It had trailed behind the ferries, masked by them, and was pulling abreast of the navy yard.

The Holland submarine burst from the water, revealing her conning tower and the full hundred feet of her hull. Blue smoke spewed. Gasoline exhaust, Bell realized, from her powerful main engine. On the surface now, she was a full-fledged torpedo boat, quick and nimble.

But vulnerable.

Bell shoved the steam lever forward, seizing this precious chance to ram her. But even as the steel yacht gathered speed, the long Holland heeled into a tight turn and pointed straight at Dyname. Her bow reared. Bell saw the dark maw of an open bow tube. From it leaped a Mark 14 Wheeler torpedo.

Chapter 55

55

THE TORPEDO SUBMERGED.

Isaac Bell could only guess whether to steer left or right. He could not see the torpedo bearing down on him underwater. Nor whether it was veering left or right. Whatever wake it trailed was erased by the heavy chop. Dyname was one hundred feet long and ten feet wide. The instant he turned, he would present a bigger target broadside. If he guessed wrong, the TNT warhead would blow the yacht to pieces. O’Shay would submerge to reload at leisure and continue his attack.

Bell steered straight ahead.

The Holland saw him coming. It began to submerge. But it was descending too slowly to escape the knife-thin steel hull bearing down on it at nearly forty knots. It turned abruptly to the right, Isaac Bell’s left. He still could not see the torpedo’s wake, nor any trail of bubbles. “Hang on, Uncle Danny!” he shouted down the voice pipe, and turned left to ram.