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