"Good-night, sir."

He tipped his hat and strode away to the Walker House, where he was
staying.

She stood watching him until he was several blocks distant and then gave
vent to a low, peculiar whistle.

Instantly four men came gliding from the shadows, and grouped around her,
as she started to walk away.

She was heading for the railroad depot.

When she was gone, Harry Brady slid down from the dense foliage of a nearby
tree where he had been a hidden watcher.

The boy had seen the woman and her body-guard, and knew that his partner
wanted him to shadow her from that point.

Accordingly he glided along after them.

Dodging from tree to tree, slinking along in the densest shadows and never
exposing himself for an instant in a ray of light which would betray him,
Harry dogged them to the railroad station.

He saw them purchase tickets and board a train.

Gliding over to the ticket office he asked the agent: