The Chief Inspector thought it more than probable. In his opinion, the two men had parted from each other within a hundred yards from the Observatory walls. He explained also how the other man could have got out of the park speedily without being observed. The fog, though not very dense, was in his favour. He seemed to have escorted the other to the spot, and then to have left him there to do the job single-handed. Taking the time those two were seen coming out of Maze Hill Station by the old woman, and the time when the explosion was heard, the Chief Inspector thought that the other man might have been actually at the Greenwich Park Station, ready to catch the next train up, at the moment his comrade was destroying himself so thoroughly. “Very thoroughly—eh?” murmured the Assistant Commissioner from under the shadow of his hand. The Chief Inspector in a few vigorous words described the aspect of the remains. “The coroner’s jury will have a treat,” he added grimly. The Assistant Commissioner uncovered his eyes. “We shall have nothing to tell them,” he remarked languidly. He looked up, and for a time watched the markedly non-committal attitude of his Chief Inspector. His nature was one that is not easily accessible to illusions. He knew that a department is at the mercy of its subordinate officers, who have their own conceptions of loyalty. His career had begun in a tropical colony. He had liked his work there. It was police work. He had been very successful in tracking and breaking up certain nefarious secret societies amongst the natives. Then he took his long leave, and got married rather impulsively. It was a good match from a worldly point of view, but his wife formed an unfavourable opinion of the colonial climate on hearsay evidence. On the other hand, she had influential connections. It was an excellent match. But he did not like the work he had to do now. He felt himself dependent on too many subordinates and too many masters. The near presence of that strange emotional phenomenon called public opinion weighed upon his spirits, and alarmed him by its irrational nature. No doubt that from ignorance he exaggerated to himself its power for good and evil—especially for evil; and the rough east winds of the English spring (which agreed with his wife) augmented his general mistrust of men’s motives and of the efficiency of their organisation. The futility of office work especially appalled him on those days so trying to his sensitive liver.