The terrain--Lower New York--The consulates--The economic problem of supplying Germany and checking supplies to the Allies--The diplomatic problem of keeping America's friendship--The military problem in Canada, Mexico, India, etc.--Germany's denial. III THE RAIDERS AT SEA 28 The outbreak of war--Mobilization of reservists--The Hamburg-American contract--The _Berwind_--The _Marina Quezada_--The _Sacramento_--Naval battles. IV THE WIRELESS SYSTEM 43 The German Embassy a clearing house--Sayville--German's knowledge of U. S. wireless--Subsidized electrical companies--Aid to the raiders--The _Emden_--The _Geier_--Charles E. Apgar--The German code. V MILITARY VIOLENCE 60 The plan to raid Canadian ports--The first Welland Canal plot--Von Papen, von der Goltz and Tauscher--The project abandoned--Goltz's arrest--The Tauscher trial--Hidden arms--Louden's plan of invasion. VI PAUL KOENIG 73 Justice and Metzler--Koenig's personality--von Papen's checks--The "little black book"--Telephone codes-- Shadowing--Koenig's agents--His betrayal. VII FALSE PASSPORTS 82 Hans von Wedell's bureau--The traffic in false passports--Carl Ruroede--Methods of forgery--Adams' coup--von Wedell's letter to von Bernstorff--Stegler-- Lody--Berlin counterfeits American passports--von Breechow. VIII INCENDIARISM 100 Increased munitions production--The opening explosions-- Orders from Berlin--Von Papen and Seattle--July, 1915--The Van Koolbergen affair--The Autumn of 1915--The Pinole explosion. IX MORE BOMB PLOTS 117 Kaltschmidt and the Windsor explosions--The Port Huron tunnel--Werner Horn--Explosions embarrass the Embassy--Black Tom--The second Welland affair--Harry Newton--The damage done in three years--Waiter spies. X FRANZ VON RINTELEN 138 The leak in the National City Bank--The _Minnehaha_--Von Rintelen's training--His return to America--His aims--His funds--Smuggling oil--The Krag-Joergensen rifles--Von Rintelen's flight and capture. XI SHIP BOMBS 154 Mobilizing destroying agents--The plotters in Hoboken--Von Kleist's arrest and confession--The _Kirk Oswald_ trial--Further explosions--The _Arabic_--Robert Fay--His arrest--The ship plots decrease. XII LABOR 171 David Lamar--Labor's National Peace Council--The embargo conference--The attempted longshoremen's strike--Dr. Dumba's recall. XIII THE SINKING OF THE LUSITANIA 190 The mistress of the seas--Plotting in New York--The _Lusitania's_ escape in February, 1915--The advertised warning--The plot--May 7, 1915--Diplomatic correspondence--Gustave Stahl--The results.