However, the fog thickened a little, and this encouraged him to venture; he beached the boat very gently on the muddy shore, and began his work, looking up every now and then at that pale light, and ready to fly at the first alarm.
He took out of the boat a large varnish-can, which he had filled with gunpowder, and wrapped tightly round with wire, and also with a sash-line; this can was perforated at the side, and a strong tube screwed tightly into it; the tube protruded twelve inches from the can in shape of an S: by means of this a slow-burning fuse was connected with the powder; some yards of this fuse were wrapt loosely round the can.
Cole crept softly to the engine-chimney, and, groping about for the right place, laid the can in the engine bottom and uncoiled the fuse. He took out of his pocket some small pieces of tile, and laid the fuse dry on these.
Then he gave a sigh of relief, and crept back to the boat.
Horrible as the action was, he had done all this without much fear, and with no remorse, for he was used to this sort of work; but now he had to commit a new crime, and with new and terrible materials, which he had never handled in the way of crime before.
He had in his boat a substance so dangerous that he had made a nest of soft cotton for the receptacle which held it; and when the boat touched the shore, light as the contact was, he quaked lest his imprisoned giant-devil should go off and blow him to atoms.
He put off touching it till the last moment. He got his jointed ladder, set it very softly underneath the window where the feeble gas-light was, and felt about with his hands for the grating he had observed when he first reconnoitered the premises from the river.
He found it, but it was so high that he had to reach a little, and the position was awkward for working.
The problem was how to remove one of those bars, and so admit his infernal machine; it was about the shape and size of an ostrich's egg.
It must be done without noise, for the room above him was Little's, and Little, he knew, had a wire by means of which he could summon Ransome and the police in the turn of a hand.
The cold of the night, and the now present danger, made Cole shiver all over, and he paused.
But he began again, and, taking out a fine steel saw highly tempered, proceeded to saw the iron slowly and gently, ready at the first alarm to spring from his ladder and run away.
With all his caution, steel grated against steel, and made too much noise in the stilly night. He desisted. He felt about, and found the grating was let into wood, not stone; he oiled the saw, and it cut the wood like butter; he made two cuts like a capital V, and a bar of the grating came loose; he did the same thing above, and the bar came out.
Cole now descended the ladder, and prepared for the greatest danger of all. He took from its receptacle the little metal box lined with glazed paper, which contained the fulminating silver and its fuse; and, holding it as gently as possible, went and mounted the ladder again, putting his foot down as softly as a cat.
But he was getting colder and colder, and at this unfortunate moment he remembered that, when he was a lad, a man had been destroyed by fulminating silver--quite a small quantity--in a plate over which he was leaning; yet the poor wretch's limbs had been found in different places, and he himself had seen the head; it had been torn from the trunk and hurled to an incredible distance.
That trunkless head he now fancied he saw, in the middle of the fog; and his body began to sweat cold, and his hands to shake so that he could hardly told the box. But if he let it fall--
He came hastily down the ladder and sat down on the dirty ground, with the infernal engine beside him.
By-and-by he got up and tried to warm his hands and feet by motion, and at last he recovered his fortitude, and went softly and cat-like up the steps again, in spite of the various dangers he incurred.
Of what was this man's mind composed, whom neither a mere bribe could buy to do this deed, nor pure fanaticism without a bribe; but, where both inducements met, neither the risk of immediate death, nor of imprisonment for life, nor both dangers united, could divert him from his deadly purpose, though his limbs shook, and his body was bedewed with a cold perspiration?
He reached the top of the ladder, he put his hand inside the grate; there was an aperture, but he could not find the bottom. He hesitated.
Here was a fresh danger: if he let the box fall it might explode at once and send him to eternity.
Once more he came softly down, and collected all the tow and wool he could find. He went up the ladder and put these things through the grating; they formed a bed.
Then he went back for the fatal box, took it up the ladder with beating heart, laid it softly in its bed, uncoiled the fuse and let it hang down.
So now these two fiendish things were placed, and their devilish tails hanging out behind them. The fuses had been cut with the utmost nicety to burn the same length of time--twelve minutes.
But Cole was too thoughtful and wary to light the fuses until everything was prepared for his escape. He put the ladder on board the boat, disposed the oars so that he could use them at once; then crept to the engine-chimney, kneeled down beside the fuse, looked up at the faint light glimmering above, and took off his hat.
With singular cunning and forethought he had pasted a piece of sandpaper into his hat. By this means he lighted a lucifer at once, and kept it out of sight from the windows, and also safe from the weather; he drew the end of the fuse into the hat, applied the match to it out of sight, then blew the match out and darted to his other infernal machine. In less than ten seconds he lighted that fuse too; then stepped into the boat, and left those two devilish sparks creeping each on its fatal errand. He pulled away with exulting bosom, beating heart, and creeping flesh. He pulled swiftly up stream, landed at the bridge, staggered up the steps, and found Coventry at his post, but almost frozen, and sick of waiting.
