Durkin's first feeling, as he scrambled to his feet and half-stumbled, half-groped his way along the narrow, tunnel-like passage, was an untimely and impotent and almost delirious passion to get out into the open and fight—fight to the last, if need be, for all that narrowing life still held for him. This feeling was followed by a quick sense of frustration as he realized his momentary helplessness and how comprehensive and relentless seemed the machinery of intrigue opposing him.
Yet, he told himself with that lightning-like rapidity of thought which came to him at such moments of peril, however intricate and vast the machinery, however carefully planned the line of impending campaign, the human element would be an essential part of it. And his last forlorn hope, his final fighting chance, lay in the fact that wherever the human element entered there also entered weakness and passion and the possibility of accident.
What now remained to him, he warned himself as he hurriedly locked and barred the two steel doors which shut off the first and second passageway, was to think quickly and act decisively. Somewhere, at some unforeseen moment, his chance might still come to him.
As for himself, he felt that he was safe enough, for the time being. The officer who had detected him in the manhole would be sure to follow up a case so temptingly suspicious. The police, in turn, could take open advantage of an intrusion so obviously unauthorized and ominous as his own, and find in it ample excuse for investigating a quarter which for many months must have been under suspicion. But, under any circumstances, well guarded as that poolroom fortress stood, its resistance could be only a matter of time, and of strictly limited time, once the reserves were on the scene.
Durkin's first thought, accordingly, was of the roof, for, so far as he knew, all escape from the ground floor was even then cut off. Yet the first door leading from the vault chamber he found to be steel-bound and securely locked. He surmised, with a gasp of consternation, that the doors above him would be equally well secured. He remembered that Penfield never did things by halves, and he felt that his only escape lay in that upward flight.
So he saw that it was to be a grim race in demolition; that while he was to gnaw and eat his way upward through steel and brick, like a starving rat boring its passage up through the chambers of a huge granary, his pursuers would be pounding and battering at the lower doors in just as frenzied pursuit.
He no longer hesitated, but moved with that clear-thoughted rapidity of action which often came to him in his moments of half-delirium. Turning to his tool-bag and scooping out his bar of soap, he kneaded together enough of the nitroglycerine from one of the stout rubber bags to make a mixture of the consistency of liquid honey. This he quickly but carefully worked into the crack of the obstructing door. Then he attached his detonator, and shortened and lighted his fuse, scuttling back to the momentary shelter of the outer passage, making sure to be beyond the deadly "feathered radius" of the nitro.
There he waited behind the steel-bound door for the coming detonation. The sound of it smote him like a blow on the chest, followed by a rush of air and a sudden feeling of nausea.
But he did not wait. He groped his way in, relocked the passage door and crawled on all fours through the smoke and heavy, malodorous gases.
The remnants of the blasted door hung, like a tattered pennon, on one twisted hinge, and his way now lay clear to the ladder of grilled ironwork leading to the floor above. But here the steel trapdoor again barred his progress. One sharp twist and wrench with his steel lever, however, tore the bolt-head from its setting, and in another half-minute he was standing on the closed door above, shutting out the noxious smoke from the basement.