Nick Carter Stories No. 138 May 1, 1915; The Traitors of the Tropics; or, Nick Carter's Royal Flush

A famed detective races to protect an injured Caribbean prince who survives an assassination attempt and must reach his country by a fixed date to prevent a political transfer to a neighboring state. Despite a surgeon's warning, the prince insists on traveling and the detective devises an audacious plan to ensure his arrival. The narrative follows further attempts on the prince's life, growing suspicion of a treacherous cousin and a scheming minister, and the detective's tactical efforts to expose the conspirators and safeguard the nation's future.