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unsolved mystery, or, Nick Carter's government case
An international conspiracy, or, Nick Carter's second assistant in a new field
Plotters against a nation, or, The mystery of the perfumed handkerchief
Mignon Duprez, the female spy, or, Patsy's fight for Adelina
The nihilist's second move, or, Nick Carter's timely interference
The brotherhood of Free Russia, or, Nick Carter's beautiful friend Olga
White House mystery, or, Nick Carter's case for the president
The great spy system, or, Nick Carter's promise to the president
The invisible twelve, an Irish romance of the present day
An emperor at bay, or, Nick Carter defies the czar