THE OPPIDUM 11 CHAPTER III. THE FIRST SIEGE 26 CHAPTER IV. THE COST OF DEFENDERS 65 CHAPTER V. THE SECOND SIEGE 69 CHAPTER VI. THE PERMANENT CAMP--FOUNDATION OF A CITÉ 90 CHAPTER VII. THE FORTIFIED CITÉ 97 CHAPTER VIII. THE THIRD SIEGE 108 CHAPTER IX. THE FEUDAL CASTLE 157 CHAPTER X. THE FOURTH SIEGE 178 CHAPTER XI. THE FIRST DEFENCES AGAINST FIRE ARTILLERY 226 CHAPTER XII. THE FIFTH SIEGE 239 CHAPTER XIII. THE CITÉ OF LA ROCHE-PONT IS FORTIFIED BY ERRARD DE BAR-LE-DUC, ENGINEER TO THE MOST CHRISTIAN KING OF FRANCE AND NAVARRE 275 CHAPTER XIV. THE SIXTH SIEGE 282 CHAPTER XV. THE TOWN OF LA ROCHE-PONT IS FORTIFIED BY M. DE VAUBAN 304 CHAPTER XVI. THE SEVENTH SIEGE 315 CHAPTER XVII. CONCLUSION 354 EXPLANATION OF SOME OF THE TECHNICAL TERMS USED IN THIS BOOK 385 LIST OF ILLUSTRATIONS. FIG. PAGE 1. MAP OF THE LAND OF OHET _Frontispiece_. THE SAPPER _Vignette_. 2. THE OPPIDUM 14 3. RAMPART OF THE OPPIDUM 15 4. GATES OF THE OPPIDUM 16 5. THE NÉMÈDE AND THE DRUIDS' DWELLINGS 16 FIRST SIEGE.--SIGILD AND TOMAR 32 6. " " WOODEN TOWERS OF THE OPPIDUM 35 7. " " ADVANCED WORK OF THE OPPIDUM 46 8. " " ASSAULT ON THE OPPIDUM 55 9. THE TOWN AND CITÉ D'AVON (WAR OF THE GAULS) 70 10. SECOND SIEGE.--THE ROMAN 'AGGER' AND 'VINEÆ' 79 11. " " A STIMULUS 80 12. " " THE MOVABLE TOWER 82 13. " " ATTACK ON THE STRONGHOLD OF THE OPPIDUM 86 14. THE ROMAN PERMANENT CAMP 91 15. GATES OF THE CAMP 93 16. THE GALLO-ROMAN TOWN. CITY JULIANA (_to face_) 99 17. SECTION OF THE RAMPART WALL 103 18. PLANS OF THE NORTH GATE 104