CHAPTER I.

      RED LAKE

      Shefford halted his tired horse and gazed with slowly realizing eyes.

      A league-long slope of sage rolled and billowed down to Red Lake, a dry red basin, denuded and glistening, a hollow in the desert, a lonely and desolate door to the vast, wild, and broken upland beyond.

      All day Shefford had plodded onward with the clear horizon-line a thing unattainable; and for days before that he had ridden the wild bare flats and climbed the rocky desert benches. The great colored reaches and steps had led endlessly onward and upward through dim and deceiving distance.

      A hundred miles of desert travel, with its mistakes and lessons and intimations, had not prepared him for what he now saw. He beheld what seemed a world that knew only magnitude. Wonder and awe fixed his gaze, and thought remained aloof. Then that dark and unknown northland flung a menace at him. An irresistible call had drawn him to this seamed and peaked border of Arizona, this broken battlemented wilderness of Utah upland; and at first sight they frowned upon him, as if to warn him not to search for what lay hidden beyond the ranges. But Shefford thrilled with both fear and exultation. That was the country which had been described to him. Far across the red valley, far beyond the ragged line of black mesa and yellow range, lay the wild canyon with its haunting secret.

      Red Lake must be his Rubicon. Either he must enter the unknown to seek, to strive, to find, or turn back and fail and never know and be always haunted. A friend’s strange story had prompted his singular journey; a beautiful rainbow with its mystery and promise had decided him. Once in his life he had answered a wild call to the kingdom of adventure within him, and once in his life he had been happy. But here in the horizon-wide face of that up-flung and cloven desert he grew cold; he faltered even while he felt more fatally drawn.

      As if impelled Shefford started his horse down the sandy trail, but he checked his former far-reaching gaze. It was the month of April, and the waning sun lost heat and brightness. Long shadows crept down the slope ahead of him and the scant sage deepened its gray. He watched the lizards shoot like brown streaks across the sand, leaving their slender tracks; he heard the rustle of pack-rats as they darted into their brushy homes; the whir of a low-sailing hawk startled