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Texan spy, or, The prairie guide
Nadia, the Russian spy
Tonkawa spy, or, The Comanche foray
Texan spy, or, The prairie guide
Twenty boy spies, or, The secret band of Dismal Hollow
The brand of Siberia, or, The boy tracker of the Steppes
The blue mask, or, Fighting against the Czar
The iron grays, or, The boy riders of the Rapidan