‘Sitting lonely and apathetic without a light, at his own chamber-window at night time, our mechanician frequently observed dark figures descending these steps and ultimately discovered that the house was the meeting-place of a fraternity of political philosophers, whose object was the extermination of tyrants and despots, and the overthrow of established religions. The discovery was startling enough, but our hero was not easily startled. He kept their secret and lived on as before. At last the mechanician and his affairs became known to the society, as the affairs of the society had become known to the mechanician, and, instead of shooting him as one who knew too much for their safety, they were struck with his faculty for silence, and thought they might be able to make use of him.’

‘To be sure,’ said Abner Power.

‘Next, like friend Bunyan, I saw in my dream that denunciation was the breath of life to this society. At an earlier date in its history, objectionable persons in power had been from time to time murdered, and curiously enough numbered; that is, upon the body of each was set a mark or seal, announcing that he was one of a series. But at this time the question before the society related to the substitution for the dagger, which was vetoed as obsolete, of some explosive machine that would be both more effectual and less difficult to manage; and in short, a large reward was offered to our needy Englishman if he would put their ideas of such a machine into shape.’

Abner Power nodded again, his complexion being peculiar—which might partly have been accounted for by the reflection of window-light from the green-baize table-cloth.

‘He agreed, though no politician whatever himself, to exercise his wits on their account, and brought his machine to such a pitch of perfection, that it was the identical one used in the memorable attempt—’ (Dare whispered the remainder of the sentence in tones so low that not a mouse in the corner could have heard.) ‘Well, the inventor of that explosive has naturally been wanted ever since by all the heads of police in Europe. But the most curious—or perhaps the most natural part of my story is, that our hero, after the catastrophe, grew disgusted with himself and his comrades, acquired, in a fit of revulsion, quite a conservative taste in politics, which was strengthened greatly by the news he indirectly received of the great wealth and respectability of his brother, who had had no communion with him for years, and supposed him dead. He abjured his employers and resolved to abandon them; but before coming to England he decided to destroy all trace of his combustible inventions by dropping them into the neighbouring lake at night from a boat. You feel the room close, Mr. Power?’

‘No, I suffer from attacks of perspiration whenever I sit in a consecrated edifice—that’s all. Pray go on.’

‘In carrying out this project, an explosion occurred, just as he was throwing the stock overboard—it blew up into his face, wounding him severely, and nearly depriving him of sight. The boat was upset, but he swam ashore in the darkness, and remained hidden till he recovered, though the scars produced by the burns had been set on him for ever. This accident, which was such a misfortune to him as a man, was an advantage to him as a conspirators’ engineer retiring from practice, and afforded him a disguise both from his own brotherhood and from the police, which he has considered impenetrable, but which is getting seen through by one or two keen eyes as time goes on. Instead of coming to England just then, he went to Peru, connected himself with the guano trade, I believe, and after his brother’s death revisited England, his old life obliterated as far as practicable by his new principles. He is known only as a great traveller to his surviving relatives, though he seldom says where he has travelled. Unluckily for himself, he is WANTED by certain European governments as badly as ever.’

Dare raised his eyes as he concluded his narration. As has been remarked, he was sitting at one end of the vestry-table, Power at the other, the green cloth stretching between them. On the edge of the table adjoining Mr. Power a shining nozzle of metal was quietly resting, like a dog’s nose. It was directed point-blank at the young man.

Dare started. ‘Ah—a revolver?’ he said.

Mr. Power nodded placidly, his hand still grasping the pistol behind the edge of the table. ‘As a traveller I always carry one of ‘em,’ he returned; ‘and for the last five minutes I have been closely considering whether your numerous brains are worth blowing out or no. The vault yonder has suggested itself as convenient and snug for one of the same family; but the mental problem that stays my hand is, how am I to despatch and bury you there without the workmen seeing?’