Excerpt from The Invention of Fire by Bruce Holsinger, plus links to reviews, author biography & more

Prologue

THE WATER SEEPED PAST, groping for the dead. It was early on an Ember Saturday, and low down along the deepest channel in London, Alan Pike braced for a fall. He sucked a shallow breath as beside him his son moved through the devilish swill. The boy's arms were thin as sticks but lifted his full spade with a ready effort, even a kind of cheer. Good worker, young Tom, a half knob shy of fourteen, reliable, strong, uncomplaining, despite all a gongfarmer had to moan about—quite a heavy lot, helping the city streams breathe easy. Tom filled another bucket and hefted it to one of the older boys to haul above for the dungcart. From there it would be wheeled outside the walls, likely to feed some bishop's roses.

Night soil, the mayor's men primly called it, though it had commoner names. Dung and gong, fex and flux, turd and purge and shit. Alan Pike and his crew, they called it hard work and wages. Dark work, mostly, as London didn't like its underbelly ripped open to the sun, so here he was with his fellows, a full four hours after the curfew bell, working in the calm quiet a few leaps down from the loudest, busiest crossing in London. The junction of Broad Street, Cornhill and the Poultry, the stocks market, and everything else. The brassy navel of the city by day; a squalid gut in the night.

Alan squinted through the pitch, peering past his son down the jagged line of buildings spanning this length of the Walbrook. Twenty privies, by his estimate, most attached to private houses and tenements hulked up over the open stream, but two of the highest seats had been built to the common good for use by all. The Long Dropper, this great institution was called, and a farthing a squeeze the custom, the coins collected by a lame beggar enjoying the city's modest gesture of charity toward its most wretched.

At night, though, no one was posted at the hanging doors up top. The parish was at a hush. The only sounds to be heard were the shallow breathing of his son, a faint snore from one of the houses above, the scurryings and chewings of the brook rats all round.

"Any closer, Father?" Tom, always respectful even when tired out, though Alan could tell he was ready to leave off. It had already been a long night.

"Let us have a look," said Alan, lengthening his back, hearing a happy pop. He legged it through the muck and mud to the middle of the stream. Earlier they had rigged up a row of lanterns at either end of the stretch to light the crew's work, show them what they were meddling with. In the past hour the stream had loosened up fairly well at the north end, but the water was still damming farther in, and as he squatted and peered through the stink he had to shift both ways to spy the three orbs of pale light at the far end of the clogged channel. He shook his head, sucked a lip.

A major blockage, this one.

Something big. Something stuck. The Walbrook's moderate flow should have pushed most anything down to the Thames. Not this lot, whatever it was. A pile of rotten lumber, could be. Or a horse, lamed on the street and shoved over the bank to struggle and drown, like that old mare they'd roped out of the Fleet Ditch last month. Whatever this bulk turned out to be, the Guildhall would hear about it, that was certain.

Alan turned to his crew. "Fetch me one of those lanterns there."

The young man behind Tom repeated the command to another fellow closer to the lamp string, who trudged back and removed one of the oil lamps dangling from the line. When Alan had it in his grip he held the light before him, up and to the side, and moved ahead. One step, another. This section of the stream was almost impassable. Up to his hips now. The thick, nearly immovable sludge clung to his legs like a dozen rutting dogs. He had to will his body to move forward, every step a victory.

He was taking a risk, he knew that, and for what?

Excerpted from The Invention of Fire by Bruce Holsinger. Copyright © 2015 by Bruce Holsinger. Excerpted by permission of William Morrow. All rights reserved. No part of this excerpt may be reproduced or reprinted without permission in writing from the publisher.