As he dragged out the last word another paroxysm of coughing overtook him. It lasted for several seconds, and then, with a queer, fluttering movement of the eyelids, his head suddenly lolled over sideways on to his shoulder, the under jaw dropping open at the same time. Colin lowered his burden to the ground, and after wiping his hands on the grass, rose to his feet. For a moment the Inspector stood still, gazing down at the body. "Well, that's done the hangman out of a job," he observed regretfully. "What's more, I believe the devil was right. We shall only be able to charge Medwin with conspiracy, though if any man ever deserved---- Hullo! here's somebody coming!" He broke off abruptly at the sight of a dark figure, which was approaching along the roadway from the direction in which they had been travelling. "One of the men from the powder works, I expect," said Colin. "We're quite close by, and they probably heard the crash." Marsden stepped forward to meet the new arrival, who had turned on to the grass and was hurrying rapidly toward them. As he drew nearer they saw that he was a respectable-looking middle-aged man, dressed in a rough suit of tweeds. He came on at a kind of stumbling run, and pulled up with an exclamation of horror as the full extent of the disaster suddenly met his eyes. "Good God!" he exclaimed. "I was afraid there had been a bad accident. Is anybody killed?" "Yes," said Marsden bluntly. "Both these men are dead." He paused. "Who are you, sir, and where do you come from?" he asked. "My name's Trevor. I'm the head electrician at the powder mills just down the road." "Well, I'm a police officer," said Marsden, "and this gentleman is Doctor Gray." "A police officer?" repeated the other. "Is there anything----" "One of our friends here," continued Marsden, jerking his head in the direction of Cooper's body, "is the murderer of Professor Carter. I have no doubt you read about the case in the papers. The other was wanted on an almost equally serious charge." Their new acquaintance stood staring at them in open-mouthed amazement. "But--but what on earth were they doing down here?" he stammered. "They were trying to reach Thames Haven, where they hoped to get on board a boat. We were following them in another car, and just as they got to this point they swerved right across the road into that heap of stones. You can see the result for yourself." The electrician nodded his head. "Yes," he replied, "I can. You must excuse my being a bit flabbergasted, but it's pretty quiet round about here as a rule, and this kind of thing's a trifle out of my line." He removed the soft hat that he was wearing and wiped his forehead with his coat sleeve. "What do you propose to do?" he asked. "We've a telephone at the works if you'd like me to get into communication with any one." Marsden pulled out his pocketbook and extracted a card.