VIII. THE VITAL PRINCIPLE

IX. THE RUBBER DAGGER

X. THE SUBMARINE MINE

XI. THE GUN-RUNNER

XII. THE SUNKEN TREASURE




I

THE TREASURE-TRAIN


"I am not by nature a spy, Professor Kennedy, but--well, sometimes
one is forced into something like that." Maude Euston, who had
sought out Craig in his laboratory, was a striking girl, not
merely because she was pretty or because her gown was modish.
Perhaps it was her sincerity and artlessness that made her
attractive.

She was the daughter of Barry Euston, president of the Continental
Express Company, and one could readily see why, aside from the
position her father held, she should be among the most-sought-
after young women in the city.