Secret Service #604: The Bradys Chinese Clue

Old King Brady and Alice, peering in between the curtains, saw enough. Harry had got himself into a bad fix. There he lay on the floor with three Chinamen bending over him. One held a box, another a long glass vial. What were they about?

Originally published in 1910, this Dime Novel is #604 in the Secret Service series, which frequently featured the melodramatic exploits of Old King Brady.