[IV. IN THE GROTTO]

[V. THE MAELSTROM]

[VI. JOHN TINCROFT'S RESOLUTION]

[VII. TWO FRIENDS—TWO LETTERS]

[VIII. WHO'S WHO?]

[IX. A RIFT IN THE CLOUD]

[X. IN THE FILBERT ALLEY]

[XI. SOMETHING TO THINK ABOUT]

[XII. THE LION'S MOUTH]

[XIII. MR. RUBRIC'S LETTER]