Twitterings, and subdued squeaks, and sudden rushes of pattering feet, the murmuring of myriad fronds in the placid breeze, the whispering of the neighboring elms, even the steady chant of the distant cascade--all swelled into a soft and continuous chorus, hardly heard by the country policemen, accustomed as they were to the sounds of a woodland at night, but of surprising volume and variety to the man whose forests lay in the paved wilderness of London. Suddenly a twig cracked sharply and a match was struck. It was of the safety type and made little noise, but it was too much for the nerves of a bird, which flew away noisily. Furneaux pursed his lips and wanted to whistle. He realized now what an escape he had earlier. But the intruder seemed to care less about attracting attention than making rapid progress. He came on swiftly, striking other matches when required, until he stood on the bare ground near the rock. Not daring to lift a head, none of the three watchers could see the newcomer, and in that respect their hiding-place was almost too well chosen. Whoever it was, he needed no more matches to guide his footsteps. They heard him advancing a few paces; then he halted again. After a marked interval, punctuated by a soft, whirring noise hard to interpret, there were irregular scrapings and the creaking of a branch. Furneaux arose. Keeping a hand on the rock until he was clear of the shrubs, he crept forward on thievish feet. His assistants, moving more clumsily to their allotted station, were audible enough to him, but to a man unconscious of their presence, and actively climbing a tree, they were remote and still as Uranus and Saturn. The scraping of feet and heavy breathing, to say nothing of the prompt flight of several birds, led the detective unerringly to the trunk of a lofty chestnut which he had already fixed on as the cover whence the shot that killed Mortimer Fenley was fired. He was convinced also that the rifle was yet hidden there, and his thin lips parted in a smile now that his theory was about to be justified. He could follow the panting efforts of the climber quite easily. He knew when the weapon was unlashed from the limb to which it was bound, and when the descent was begun. He could measure almost the exact distance of his prey from the ground, and was awaiting the final drop before flashing the torch on his prisoner, when something rapped him smartly on the forehead. It was a rope, doubled and twisted, and subsequent investigation showed that it must have been thrown in a coil over the lowermost branch in order to facilitate the only difficult part of the climb offered by ten feet of straight bole.