At ten thousand feet elevation the twilight of this clear and cold night was a rich and rare atmospheric effect. It looked as if it was seen through perfectly clear smoked glass. Objects were singularly visible, even at long range, and seemed magnified. In the west, where the afterglow of sunset lingered over the dark, ragged, spruce-speared horizon-line, there was such a transparent golden line melting into vivid star-fired blue that Helen could only gaze and gaze in wondering admiration.
Dale spurred his horse into a lope and the spirited mounts of the girls kept up with him. The ground was rough, with tufts of grass growing close together, yet the horses did not stumble. Their action and snorting betrayed excitement. Dale led around several clumps of timber, up a long grassy swale, and then straight westward across an open flat toward where the dark-fringed forest-line raised itself wild and clear against the cold sky. The horses went swiftly, and the wind cut like a blade of ice. Helen could barely get her breath and she panted as if she had just climbed a laborsome hill. The stars began to blink out of the blue, and the gold paled somewhat, and yet twilight lingered. It seemed long across that flat, but really was short. Coming to a thin line of trees that led down over a slope to a deeper but still isolated patch of woods, Dale dismounted and tied his horse. When the girls got off he haltered their horses also.
"Stick close to me an' put your feet down easy," he whispered. How tall and dark he loomed in the fading light! Helen thrilled, as she had often of late, at the strange, potential force of the man. Stepping softly, without the least sound, Dale entered this straggly bit of woods, which appeared to have narrow byways and nooks. Then presently he came to the top of a well-wooded slope, dark as pitch, apparently. But as Helen followed she perceived the trees, and they were thin dwarf spruce, partly dead. The slope was soft and springy, easy to step upon without noise. Dale went so cautiously that Helen could not hear him, and sometimes in the gloom she could not see him. Then the chill thrills ran over her. Bo kept holding on to Helen, which fact hampered Helen as well as worked somewhat to disprove Bo's boast. At last level ground was reached. Helen made out a light-gray background crossed by black bars. Another glance showed this to be the dark tree-trunks against the open park.
Dale halted, and with a touch brought Helen to a straining pause. He was listening. It seemed wonderful to watch him bend his head and stand as silent and motionless as one of the dark trees.