"No," he agreed, "it doesn't matter. And I shall do well enough." Then the three went out, and she finished her breakfast alone.

In less than an hour the troop was ready, the men flannel-shirted and gauntleted, their soft felt hats pulled over their eyes, standing reins in hand, foot in stirrup, beside the fine, big horses that Crook had substituted for the broncos of the plains cavalry of former years. Down by the corrals the pack-mules were ready, too, grunting under their aparejos and packs. A thick, hot wind, fraught with sand, was beginning, presaging one of the fearful dust storms of the southwest. The air dried the very blood in the veins. The flies, sticky and insistent, clung and buzzed about the horses' eyes and nostrils. Bunches of tumbleweed and hay went whirling across the parade.

Landor came trotting over from his quarters, followed by his orderly, and the troops moved off across the flat, toward the river.

Felipa stood leaning listlessly against the post of the ramada, watching them. After a time she went into the adobe and came out with a pair of field-glasses, following the course of the command as it wound along among the foot-hills. The day dragged dully along. She was uneasy about her husband, her nerves were shaken with the coffee and quinine, and she was filled, moreover, with a vague restlessness. She would have sent for her horse and gone out even in the clouds of dust and the wind like a hot oven, but Landor had forbidden her to leave the post. Death in the tip of a poisoned arrow, at the point of a yucca lance, or from a more merciful bullet of lead, might lurk behind any mesquite bush or gray rock.

She set about cleaning the little revolver, self-cocking, with the thumb-piece of the hammer filed away, that her husband had given her before they were married. To-night she wanted no dinner. She was given to eating irregularly; a good deal at a time, and again nothing for a long stretch. That, too, was in the blood. So she sent the soldier cook away, and he went over to the deserted barracks.

Then she tried to read, but the whisper of savagery was in the loneliness and the night. She sat with the book open in her lap, staring into a shadowy corner where there leaned an Indian lance, surmounted by a war bonnet. Presently she stood up, and stretched her limbs slowly, as a beast of prey does when it shakes off the lethargy of the day and wakens for the darkness. Then she went out to the back of the tents.

The stars were bright chips of fire in a sky of polished blue. The wind of the day had died at dusk, and the silence was deep, but up among the bare graves the coyotes were barking weirdly. As she looked off across the low hills, there was a quick, hissing rattle at her feet. She moved hastily, but without a start, and glanced down at a rattler not three feet away.

Landor's sabre stood just within the sitting room, and she went for it and held the glittering blade in front of the snake. Its fangs struck out viciously again and again, and a long fine stream of venom trickled along the steel. Then she raised the sabre and brought it down in one unerring sweep, severing the head from the body. In the morning she would cut off the rattle and add it to the string of close upon fifty that hung over her mirror. But now the night was calling to her, the wild blood was pricking in her veins. Running the sabre into the ground, she cleaned off the venom, and went back to the adobe to put it in its scabbard.

After she had done that she stood hesitating for just a moment before she threw off all restraint with a toss of her head, and strapped about her waist a leather belt from which there hung a bowie knife and her pistol in its holster. Then slipping on her moccasins, she glided into the darkness. She took the way in the rear of the quarters, skirting the post and making with swift, soundless tread for the river. Her eyes gleamed from under her straight, black brows as she peered about her in quick, darting glances.