The drainage pipe was about two meters wide and built with bricks and stones. Most of its width was occupied by the watercourse, its waters appearing pitch black in the torchlight, its depth indiscernible.
Along the edge of the pipe, a narrow path just wide enough for a person to walk on had been constructed, probably intended for the maintenance workers to clear the sludge.
The trio walked in silence, turning left and right, having no idea how long they'd been walking. But after Winters had counted twelve intersections, he began to vaguely hear footsteps ahead; there seemed to be flickering firelight as well.
Moving forward, Colonel Field suddenly turned right with Winters, entering a hidden passage in the wall of the pipe. After a few dozen steps, the space suddenly opened up.