Gentleman Geoff's fists clenched and he drew a deep breath.

"That's it!" he cried. "You've struck it, Mr. Thode! Unless I'm mistaken, he's dealing the biggest, crookedest hand of his life right now, but we'll get him, Sir. We'll show him what fair play is below the border—"

He broke off and for a minute the two men sat in silence, straining their ears.

Above the click of glasses and sound of many voices in the gambling-rooms had come the sharp, staccato clatter of a horse's hoofs upon the hard-packed road. It was not unusual in a land where hooch was cheap and stimulating and every drunken roysterer celebrated in the saddle, but there was an ominous, tragic suggestion in the irregularity of the hoof-beats as of an exhausted, failing beast urged on by grim and vital need.

The young engineer leaped to his feet as the clatter ceased in a harsh scraping thud, and with Gentleman Geoff beside him, he crossed the patio and re-entered the gambling-room. The voices had hushed as if by magic, and every motionless figure was turned toward the entrance door.

It was flung open and a man staggered blindly over the sill, reeling and clutching at his breast with both gnarled, sinewy hands.

"El Negrito!" his voice rose in a smothered sob. "He's hit the trail and coming fast. Look out for your——"

The stranger choked, caught at his throat and crumpled slowly to the floor, a thin scarlet stream pouring from his lips. The silence held for one tense moment and then pandemonium broke loose.

"A raid! A raid!"

Hoarse cries filled the room and a mad stampede ensued, but somehow through the rampant throng, Kearn Thode found himself before that fallen figure. Gentleman Geoff was still at his side, but another had been quicker than they. Soft hands raised the dying man's head and Billie knelt beside him, her pallor intensified but her eyes steady and calm.