The House That Jack Built by Robert Asprin & Linda Evans

“Which tunnel?” Skeeter gasped as Tanglewood and Margo bounded down the last few steps to join them. “Which one did he go down?” They listened intently at each entrance for the echo of footfalls. The chugging of water pumps growled and echoed. They couldn’t distinguish anything like a sound of running footsteps against the background noise.

“That one!” Armstrong finally decided, pointing to the pedestrian tunnel. “I doubt he wants to risk meeting a train. He’s no coward, but he’s no fool, either.”

Dank, chilly air closed in as they pelted down the echoing brickwork and stone tube in pursuit. A few handcarts loaded high with coal and wooden crates jockeyed for space in the narrow tunnel. Gas lamps gave plentiful if rather dim light the length of the shaft, which had been constructed as a series of connective arches beneath the river. Nearly forty-five years old, the long pedestrian tube remained the province of footpads, thieves, and innumerable prostitutes who led a troglodyte’s existence beneath the river. They passed sleeping drunks huddled in the brick archways, women who’d set up stalls at which tawdry goods and cheap jewelry could be purchased. Ragged children begged for money. A pair of roughly dressed men eyed them as they shot past, then thought better.

A train deafened them as it roared past on the other side of the brick supporting wall. If Kaederman had chosen the other route—or if they had—they’d have been crushed under the wheels. Then they were through, emerging on the Wapping side of the river, somewhere to the east of the great London Docks. The eighty-foot climb up the dizzying double-spiral of the Wapping shaft, a twin of the Rotherhithe entryway, winded Skeeter badly halfway up. He staggered on with a stitch in his side and cursed Kaederman with every upward step of burning thigh muscles. They caught a glimpse of him from time to time on the way up, moving doggedly toward the street high above.