HARPER & BROTHERS PUBLISHERS
NEW YORK AND LONDON
On Secret Service
Copyright, 1921, by Harper & Brothers
Printed in the United States of America
CONTENTS
| PAGE | ||
| I. | [A Flash in the Night] | 1 |
| II. | [The Mint Mystery] | 15 |
| III. | [The Ypiranga Case] | 28 |
| IV. | [The Clue on Shelf 45] | 42 |
| V. | [Phyllis Dodge, Smuggler Extraordinary] | 57 |
| VI. | [A Matter of Record] | 73 |
| VII. | [The Secret Still] | 88 |
| VIII. | [The Taxicab Tangle] | 103 |
| IX. | [A Match for the Government] | 118 |
| X. | [The Girl at the Switchboard] | 133 |
| XI. | ["Lost—$100,000!"] | 149 |
| XII. | ["The Double Code"] | 164 |
| XIII. | [The Trail of the White Mice] | 180 |
| XIV. | [Wah Lee and the Flower of Heaven] | 195 |
| XV. | [The Man with Three Wives] | 210 |
| XVI. | [After Seven Years] | 225 |
| XVII. | [The Poison-pen Puzzle] | 239 |
| XVIII. | [Thirty Thousand Yards of Silk] | 254 |
| XIX. | [The Clue in the Classified Column] | 268 |
| XX. | [In the Shadow of the Capitol] | 283 |
| XXI. | [A Million-dollar Quarter] | 298 |
| XXII. | ["The Looting of the C. T. C."] | 313 |
| XXIII. | [The Case of Mrs. Armitage] | 328 |
| XXIV. | [Five Inches of Death] | 343 |