| Chapter | Page |
| I. | A Social Mystery | [7] |
| II. | The Mystery Deepens | [13] |
| III. | Prof. Poppendorf | [19] |
| IV. | Prof. Poppendorf's Lecture | [29] |
| V. | A Conversation with the Disagreeable Woman | [41] |
| VI. | Count Penelli | [50] |
| VII. | Macy's | [61] |
| VIII. | The Professor in Love | [71] |
| IX. | An Evening at the Boarding-House | [82] |
| X. | A Rustic Admirer | [93] |
| XI. | A Poor Patient | [104] |
| XII. | The Disagreeable Woman in a New Light | [112] |
| XIII. | Mrs. Wyman's Curiosity | [117] |
| XIV. | The Quality of Mercy | [122] |
| XV. | The Professor's Courtship | [128] |
| XVI. | Sits the Wind in that Quarter? | [139] |
| XVII. | My Rich Patient | [150] |
| XVIII. | The Professor's Book | [156] |
| XIX. | A Speech from the Throne | [162] |
| XX. | A Startling Discovery | [169] |
| XXI. | After Three Months | [174] |
| XXII. | I Appeal to the Disagreeable Woman | [181] |
| XXIII. | At Last | [185] |
| XXIV. | The Light of Hope | [189] |