His muttering echoed through the corridor, followed by a series of noises not his own.
BOOM, BOOM.
It sounded as if countless bricks and stones were grinding against each other, producing a shower of rock dust.
Li Ang's expression changed abruptly. Turning, he saw a faint light flickering at the end of the corridor, casting an immense shadow on the stone wall.
I've already memorized the entire layout of this corridor, he thought. The sound must be coming from... the stone wall next to Room F!
Li Ang made a split-second decision. He dimmed the kerosene lamp to its faintest setting, cupped his hand over the flame, and gripped the screwdriver. Crouching low, he lightened his steps and moved silently along the wall, hurrying toward the end of the corridor.
As he rounded the corner, he saw the bricks on the wall next to Room F rapidly rearranging themselves.
