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The twenty silent wolves, or, The wild riders of the mountains
The twenty doctors, or, The mystery of the coast
The twelve owls, or, The secret band of Chicago
The traveling dude, or, The comical adventures of Clarence Fitz Roy Jones
The trail hunters, or, Monowano, the Shawnee spy
The Tonkawa spy, or, The Comanche foray
The Timberdale twins, or, The boy champion skaters of Heron Lake
The three sisters, or, The mystery of Lord Chalfont
The three doors, or, Half a million in gold
The Texas hawks, or, The strange decoy
The Texan trailer, or, Davy Crockett's last bear hunt
The Texan scout, or, The Jarocho's sister
The taxicab mystery, or, Nick Carter closes a deal
The swamp riders, or, The blacksmith of Camden
Swamp Doctor, or, The man witch
The steam man of the plains, or, The terror of the West
The spy of Spuyten Duyvil, or, The boy with a charmed life
The specter skipper, or, The sunken will
The Specter Riders, or, The fort mystery
The sons of the sword, or, The watchers from the Rhine / by Richard R. Montgomery
The Sons of Liberty, or, The maid of Tryon
The slave sculptor, or, The prophetess of the secret chambers
The silver bugle, or, The Indian maiden of St. Croix
The silent tongues
The silent hunter, or, The Scowl Hall mystery