6IV. The Beauty Shop
174IX. The Submarine Harbor
7V. The Phantom Circuit
175X. The Conspirators
8VI. The Detectaphone
176XI. The Wireless Detective
9VII. The Green Curse
177XII. The Death Cloud
10VIII. The Mummy Case
178XIII. The Searchlight Gun
11IX. The Elixir of Life
179XIV. The Life Chain
12X. The Toxin of Death
180XV. The Flash
13XI. The Opium Joint
181XVI. The Disappearing Helmets
14XII. The “Dope Trust”
182XVII. The Triumph of Elaine
15XIII. The Kleptomaniac
183I. The Death-Dream
16XIV. The Crimeometer
184II. The Marble Heart
17XV. The Vampire
185III. The Freud Theory
18XVI. The Blood Test
186IV. The “Hesitation Complex”
19XVII. The Bomb Maker
187V. The Psychanalysis
20XVIII. The “Coke” Fiend
188VI. The “Other Woman”
21XIX. The Submarine Mystery
189VII. The Crook Detective
22XX. The Wireless Detector
190VIII. The Poisoned Glass
23XXI. The Ghouls
191IX. The Association Test
24XXII. The X-Ray “Movies”
192X. The Ordeal Bean
25XXIII. The Death House
193XI. The Rascon Reports
26XXIV. The Final Day
194XII. The “New Morality”
27Introduction
195XIII. The Mechanical Ear
28I. The War Terror
196XIV. The “Jung” Method
29II. The Electro-Magnetic Gun
197XV. The Conflicting Clues
30III. The Murder Syndicate
198XVI. The Finesse
31IV. The Air Pirate
199XVII. The Suppressed Desire
32V. The Ultra-Violet Ray
200XVIII. The Confession
33VI. The Triple Mirror
201XIX. The Lie-Detector
34VII. The Wireless Wiretappers
202XX. The Soul Scar
35VIII. The Houseboat Mystery
203I. A Camera Crime
36IX. The Radio Detective
204II. The Tiny Scratch
37X. The Curio Shop
205III. Tangled Motives
38XI. The “Pillar of Death”
206IV. The Fatal Script
39XII. The Arrow Poison
207V. An Emotional Maze
40XIII. The Radium Robber
208VI. The First Clue
41XIV. The Spinthariscope
209VII. Enid Faye
42XV. The Asphyxiating Safe
210VIII. Lawrence Millard
43XVI. The Dead Line
211IX. White-Light Shadows
44XVII. The Paste Replica
212X. Chemical Research
45XVIII. The Burglar's Microphone
213XI. Forestalled
46XIX. The Germ Letter
214XII. Emery Phelps
47XX. The Artificial Kidney
215XIII. Marilyn Loring
48XXI. The Poison Bracelet
216XIV. Another Clue
49XXII. The Devil Worshipers
217XV. I Become a Detective
50XXIII. The Psychic Curse
218XVI. Enid Assists
51XXIV. The Serpent's Tooth
219XVII. An Appeal
52XXV. The “Happy Dust”
220XVIII. The Antivenin
53XXVI. The Binet Test
221XIX. Around the Circle
54XXVII. The Lie Detector
222XX. The Banquet Scene
55XXVIII. The Family Skeleton
223XXI. Merle Shirley Overacts
56XXIX. The Lead Poisoner
224XXII. The Stem
57XXX. The Electrolytic Murder
225XXIII. Botulin Toxin
58XXXI. The Eugenic Bride
226XXIV. The Invisible Menace
59XXXII. The Germ Plasm
227XXV. Itching Salve
60XXXIII. The Sex Control
228XXVI. A Cigarette Case
61XXXIV. The Billionaire Baby
229XXVII. The Film Fire
62XXXV. The Psychanalysis
230XXVIII. The Phosphorus Bomb
63XXXVI. The Ends of Justice
231XXIX. Microscopic Evidence
64I. The Social Gangster
232XXX. The Ballroom Scene
65II. The Cabaret Rouge
233XXXI. Physostigmin
66III. The Fox Hunt
234XXXII. Camera Evidence
67IV. The Tango Thief
235The Silent Bullet
68V. The “The Dansant”
236The Silent Bullet
69VI. The Serum Diagnosis
237The Scientific Cracksman
70VII. The Diamond Queen
238The Bacteriological Detective
71VIII. The Anesthetic Vaporizer
239The Deadly Tube
72IX. The Twilight Sleep
240The Seismograph Adventure
73X. The Sixth Sense
241The Diamond Maker
74XI. The Infernal Machines
242The Azure Ring
75XII. The Submarine Bell
243“Spontaneous Combustion”
76XIII. The Super-Toxin
244The Terror in the Air
77XIV. The Secret Agents
245The Black Hand
78XV. The Germ of Anthrax
246The Artificial Paradise
79XVI. The Sleepmaker
247The Steel Door
80XVII. The Inter-Urban Handicap
248The Poisoned Pen
81XVIII. The Toxin of Fatigue
249The Yeggman
82XIX. The X-Ray Detective
250The Germ of Death
83XX. The Mechanical Connoisseur
251The Firebug
84XXI. The Radiograph Witness
252The Confidence King
85XXII. The Absolute Zero
253The Sand-Hog
86XXIII. The Vacuum Bottle
254The White Slave
87XXIV. The Solar Plexus
255The Forger
88XXV. The Demon Engine
256The Unofficial Spy
89XXVI. The Electrolysis Clew
257The Smuggler
90XXVII. The Perpetual Motion Machine
258The Invisible Ray
91XXVIII. The Cancer House
259The Campaign Grafter
92XXIX. The Quack Doctors
260The Treasure-Train
93XXX. The Filterable Virus
261The Truth-Detector
94XXXI. The Voodoo Mystery
262The Soul-Analysis
95XXXII. The Fluoriscine Test
263The Mystic Poisoner
96XXXIII. The Respiration Calorimeter
264The Phantom Destroyer
97XXXIV. The Evil Eye
265The Beauty Mask
98XXXV. The Buried Treasure
266The Love Meter
99XXXVI. The Weed of Madness
267The Vital Principle
100I. The Vanisher
268The Rubber Dagger
101II. The Black Book
269The Submarine Mine
102III. The Safe Robbery
270The Gun-Runner
103IV. The Anonymous Letter
271The Sunken Treasure
104V. The Suffragette Secretary
272Other Mysteries
105VI. The Woman Detective
273I. The Stolen Motor
106VII. The Gang Leader
274II. The Murder Car
107VIII. The Shyster Lawyer
275III. The Mystery of the Thicket
108IX. The Jury Fixer
276IV. The Liquid Bullet
109X. The Afternoon Dance
277V. The Blackmailer
110XI. The Typewriter Clue
278VI. The Gambling Den
111XII. The “Portrait Parle”
279VII. The Motor Bandit
112XIII. The Conviction
280VIII. The Explanation
113XIV. The Beauty Parlour
281IX. The Raid
114XV. The Phantom Circuit
282X. The Gambling Debt
115XVI. The Sanitarium
283XI. The Gangster's Garage
116XVII. The Society Scandal
284XII. The Detectaphone
117XVIII. The Wall Street Wolf
285XIII. The Incendiary
118XIX. The Escape
286XIV. The Escape
119XX. The Metric Photograph
287XV. The Plot
120XXI. The Morgue
288XVI. The Poisoned Needle
121XXII. The Canard
289XVII. The Newspaper Fake
122XXIII. The Confession
290XVIII. The Vocaphone
123XXIV. The Debacle of Dorgan
291XIX. The Eavesdropper Again
124XXV. The Blood Crystals
292XX. The Speaking Arc
125XXVI. The White Slave
293XXI. The Siege of the Bandits
126XXVII. The Election Night
294XXII. The Man Hunt
127I. The Peruvian Dagger
295XXIII. The Police Dog
128II. The Soldier of Fortune
296XXIV. The Frame-Up
129III. The Archaeological Detective
297XXV. The Scientific Gunman
130IV. The Treasure Hunters
298Chapter I
131V. The Wall Street Promoter
299Chapter II
132VI. The Curse of Mansiche
300Chapter III
133VII. The Arrow Poison
301Chapter IV
134VIII. The Anonymous Letter
302Chapter V
135IX. The Paper Fibres
303Chapter VI
136X. The X-Ray Reader
304Chapter VII
137XI. The Shoe-Prints
305Chapter VIII
138XII. The Evil Eye
306Chapter IX
139XIII. The Poisoned Cigarette
307Chapter X
140XIV. The Interferometer
308Chapter XI
141XV. The Weed of Madness
309Chapter XII
142XVI. The Ear in the Wall
310Chapter XIII
143XVII. The Voice From the Air
311Chapter XIV
144XVIII. The Antidote
312Chapter XV
145XIX. The Burglar Powder
313Chapter XVI
146XX. The Pulmotor
314Chapter XVII
147XXI. The Telescribe
315Chapter XVIII
148XXII. The Vanisher
316Chapter XIX
149XXIII. The Acetylene Torch
317Chapter XX
150XXIV. The Police Dog
318Chapter XXI
151XXV. The Gold of the Gods
319Chapter XXII
152I. The Clutching Hand
320Chapter XXIII
153II. The Twilight Sleep
321Chapter XXIV
154III. The Vanishing Jewels
322Chapter XXV
155IV. “the Frozen Safe”
323I. The Forgers
156V. The Poisoned Room
324II. The Embezzlers
157VI. The Vampire
325III. The Gun Runners
158VII. The Double Trap
326IV. The Gamblers
159VIII. The Hidden Voice
327V. The Eavesdroppers
160IX. The Death Ray
328VI. The Clairvoyants
161X. The Life Current
329VII. The Plungers
162XI. The Hour of Three
330VIII. The Abductors
163XII. The Blood Crystals
331IX. The Shoplifters
164XIII. The Devil Worshippers
332X. The Blackmailers
165XIV. The Reckoning
333XI. The Dope Fiends
166I. The Serpent Sign
334XII. The Fugitives
167II. The Cryptic Ring
335The Conspirators
168III. The Watching Eye
