Lost Fire!

Paul Looks Into the Matter

Detectives

A Suspicious Individual

The Spy

The Robbery

Encounter

Who Is Mr. Grey?

Stumped!

A Hunch

A Bump on the Head

Discovery

A New Turn of Events

Following Up Their Clues

Paul Gets Into Trouble

Parental Admonitions

False Alarm!

Captured!

Escape!

Convincing the Police

Mr. Grey

Paul Helps Out

Battle

Into the Lake

Trouble at Home

Mystery of the White Card

Again the White Card

Mystery Solved