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The sons of the sword, or, The watchers from the Rhine / by Richard R. Montgomery
The boy messenger of Russia, or, The Czar's secret despatch bearer / by Allan Arnold
Loyal to the last, or, Fighting for the Stars and Stripes
The spy of Spuyten Duyvil, or, The boy with a charmed life
The iron grays, or, The boy riders of the Rapidan
The blue mask, or, Fighting against the Czar