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276 In another sixty seconds or less it must be demonstrated whether his dead reckoning would set him down safe and sound on the roof or dash him against the walls of the Seventy-ninth Street house, to swing back and dangle impotently in mid-air till daylight and police discovered him—unless, escaping injury, he were able to pull himself up hand over hand to the girder.

With one arm round the upright to prevent the sag of rope from dragging him over prematurely, he essayed a final survey.

Either the murk deceived or Lanyard had judged shrewdly. His feet were on an approximate level with the coping round the roof, and he stood about as far from the upper girder to which the rope was hitched as that was distant from the coping.

One look up and round at those louring skies, duskily flushed by subdued city lights: with no more ceremony Lanyard released the upright and committed his body to space.

If the downward sweep was breathless, what followed was breath-taking: once past the nadir of that giant swing, he was borne upward by an impetus steadily and sensibly slackening.

Instant followed leaden-winged instant while the wall, looming like a mountainside, seemed to be toppling, insensately bent upon his annihilation; even so his momentum, decreasing with frightful swiftness, seemed possessed of demoniac desire to frustrate him.

After an age-long agony of doubt it became evident he was not destined to crash into the wall, but not that he was to gain the coping: through fractions of a second