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