THE RAIN HAD INTENSIFIED TO A DELUGE, AND ISAAC BELL could not see a full block. But the downpour had cleared the streets and sidewalks surrounding the Tombs of cops and pedestrians, and across that empty expanse he thought he saw on the farthest edge of his vision a single figure. The man’s long, loose coat was flapping as he headed west toward Elm Street.

Bell ran after him. Tall and long-legged, Bell halved the distance, when suddenly the man disappeared into a hole in the sidewalk. Isaac Bell jumped into the same hole and landed on a wooden scaffolding a few feet below grade. He saw a wooden ladder and climbed down it into a seemingly endless tunnel lit by electric lights. He found himself on the concrete floor of the covered ditch they were digging for the Rapid Transit Subway.

It resembled an orderly and much larger coal mine. It was ten times as wide as a mine and five times as high, and brightly lighted. Instead of rickety timber props, ranks of steel columns marched into the distance, holding up massive girders that spanned the tunnel to support the trolley line on Elm Street above and the stoop lines of the buildings along the sidewalks. Huge water pipes and sewer mains—from around which the ground had been painstakingly dug—were suspended from the girders with chains.

Bell looked downtown, where the lights were brightest, then uptown, where they faded. Far, far ahead in the uptown direction, he saw the man in the long coat weaving through the construction site, dodging workmen, steam hoists, and wheelbarrows. He stopped suddenly, handed something to a man pushing a wheelbarrow on a plank track, and broke into a run again. Bell raced after him. When he reached the point where he had seen him, the man with the barrow, and another burly workman who had dropped his barrow, blocked his path. Clutched in their fists were the dollars the man had given them.

“No cops allowed.”

“Don’t believe what he told you,” Bell shouted. “Get out of my way.”

“Why should we believe you?”

Bell hit the first high and low, kicked the legs out from under the second, and ran after the man in the long coat. He had a two-block lead. The concrete floor stopped abruptly. Ahead, they were digging through raw earth. Rainwater muddied the floor of the ditch. The space narrowed and grew crowded with workers with picks and shovels. Where steel columns had held the city above, here were temporary wooden beams, a rough-plank roof, and openings to the sky through which poured the rain and fading daylight.