CONTENTS -- FOREWORD -- PREFACE -- AUTHORS' NOTE -- ABBREVIATIONS -- INTRODUCTION -- I: FLANDERS FIELDS: THE YPRES SALIENT -- II: FROM SIEGE WAR TO WORLD WAR -- III: SAPPERS AND MINERS -- IV: MINE WARFARE, TUNNELLERS AND PIONIERE, 1915 -- V: KRIEGSGEOLOGIE: GOING UNDERGROUND -- VI: THE SILENT WAR -- VII: ENEMIES BELOW -- VIII: THE MINE WAR DEEPENS, 1915-1917 -- IX: 'EARTHQUAKING' THE RIDGE: MESSINES, JUNE 1917 -- X: MOUNTAINS IN THE SKY: MESSINES AND AFTER -- XI: 'A HOLE IN THE GROUND WITH A LID ON' -- XII: DEGREES OF PROTECTION, 1917-1918 -- XIII: BACK TO THE FRONT: THE LEGACY -- EPILOGUE -- SOURCES -- BIBLIOGRAPHY -- PICTURE AND ILLUSTRATION REFERENCES -- INDEX -- A -- B -- C -- D -- E -- F -- G -- H -- I -- J -- K -- L -- M -- N -- O -- P -- R -- S -- T -- U -- V -- W -- Y -- Z.