She was introduced to us by the bison herd, which came thundering across our front, with this strange figure pressing its flank and darting hither and thither from one outskirt of the flying multitude to the other. The reins lay loose on the neck of her mustang, which entered into the fierce chase like a bloodhound, doubling and twisting on its course with an agility that was wonderful.

One hand of the huntress held out a holster revolver, which she fired occasionally, but with uncertain aim, one of the bullets indeed whistling our way. The chase constituted the excitement that she sought, and the pistol was little more than a spur to urge it on.

"That's Ann, poor P—'s wife," said our guide. "Crazy since the Indians killed her husband. He was a contractor on the railroad; his camp used to be just above Hays. She lives in the old 'dug-out' on the line yet, and spends half her time chasing buffalo. She never kills none, but that isn't what she is after. She wants to be moving, and just as wild as she can; it sort o' relieves her mind."

The huntress had seen our outfit, and rode toward us. The face was a very plain one, with a vacant yet anxious expression, and the tightly-drawn skin seeming scarcely to cover the jaw-bones. She halted before us, and commenced conversation at once.

"Good day, gentlemen."

"Good day, madam."

"She always tells her story to every body," muttered the guide in a low voice.

"Have you seen any Cheyennes hereabouts, gentlemen? I sighted a party this morning, and you ought to have seen them run. Raven Dick, here, put his best foot foremost, but they shook him out of sight in a ravine. Haven't any thing better to do, friends, and so I'm riding down some buffalo."

We could easily understand why superstitious savages should run when a maniac female of such dismal aspect flitted along their trail.

"Out from Hays, sirs?" she continued, after a pause. "I left there yesterday. Dick and I camped last night. We must be home when the men come in from work this eve. Up, Rave!" and she struck the mustang a cruel blow, from which he jumped with quivering muscles, only to be violently curbed. For the first time she had just noticed our guide, and sat for an instant with her wild eyes eating a way to his heart. Then she turned again to us.