CONTENTS.I [Frank Asks Questions]XXV [The Sinister Stranger]II [A Ghastly Subject]XXVI [The Mystery of the Ring]III [An Irresistible Temptation]XXVII [Attacked on the Road]IV [A Game of Bluff]XXVIII [The Marks on the Black Stone]V [Frank's Revelation]XXIX [Bart Makes a Pledge]VI [The Plot]XXX [Frank and the Professor]VII [Spreading the Snare]XXXI [Snell Talks]VIII [The Haunted Room]XXXII [Snell's Hatred]IX [In the Meshes]XXXIII [Playing the Shadow]X [Downward]XXXIV [The Ring Disappears]XI [Trusting and True]XXXV [More Danger]XII [The Snare is Broken]XXXVI [The Secret of the Ring]XIII [The "Centipede" Joke]XXXVII ["Baby"]XIV [Lively Times]XXXVIII [Sport With a Plebe]XV [Warned]XXXIX [An Open Insult]XVI [Paul Rains]XL [For the Under Dog]XVII [The Bully's Match]XLI [Birds of a Feather]XVIII [Rains' Challenge]XLII [The Challenge]XIX [Jumping]XLIII [Doughty Duelist]XX [Bascomb's Mistake]XLIV [A Comedy Duel]XXI [The Rival Professors]XLV [Another Kind of a Fight]XXII [A Lively Call]XLVI [Result of the Contest]XXIII [Skating for Honors]XLVII [Alive!]XXIV [Skating for Life]XLVIII [Baby's Heroism—Conclusion]