fume like that which came with the milky geyser spray—that spray of death and delight mingled? Why had someone scratched a line in the earth from him directly to the distant orifice of the geyser? Was this, as he believed, a signal to come not only to the edge of the orifice, but to lower himself down into its depths? And if the line were intended as a signal, did the persons who came to the valley while he slept, always eluding him, wish him well or mean to do him harm?
Last question of all: had the beautiful girl's face he believed he had seen just once, been real or an hallucination? It had been while he was kneeling at the very edge of the geyser cone, staring down its many colored throat, that the vision had appeared. Misty white amidst the green gloom, the face had been turned up to him, smiling, its lips forming a kiss, and its great eyes beckoning. Had the face been real or a dream?
Eleven days in the valley! Now, with his braided rope ready at last, he was going to do something which might help to answer his questions.
KIRBY reached out and began to run his grass rope, yard by yard, through his hands, searching carefully for any flaw. A canyon wren made the air sweet above him, while the morning sun began to wink and blink against the shadows which still lay against the face of the guardian cliffs. Kirby glanced at his watch and got up.
Crossing beyond the mouth of the geyser, he grinned good morning at his friend the Conquistadore, and marched on into the shade of the live oak which grew nearest the geyser. Here he made one end of his rope fast to the gnarled trunk, inspected his pistol, patted his tunic to make sure that the cylinder of gold was safe, then stood by to await the geyser.
With the passing of three minutes there came from the still empty orifice a sonorous rumbling. Kirby grinned.
From deep in the earth issued a sound of fizzing and bubbling, and then, to the accompaniment of subterranean thunder, burst loose the milky, upward column which had never ceased to awe the man who watched so eagerly this morning. As the titanic jet leaped skyward now, the slanting rays of the sun caught it, and turned the water, fanning out, into a fire opal, into a sheet of living color.
Kirby, hard headed to the last, drew from the supply in one pocket of his tunic, a strip of one of the tuberlike roots, and munched it.
The thunder ceased. The waters receded.
After that Kirby hesitated not a second. Promptly he moved forward, flung his coil of line down into the geyser tunnel, and swung on to the line. By the time he had swallowed the last bite of his breakfast, the world he knew had been left behind, and he was climbing down to a new.
IT became at once apparent that the gorgeously colored, glassy-smooth throat glowed with tints which were unfamiliar to him. He could perceive these new shades of color, yet had no name for them.
As he stopped after fifty feet to breathe, the color phenomenon made him wonder if the tuber roots he had been eating had affected his vision; then decided they had not. In addition to food value, the roots had some power to stimulate courage and a slight mental exhilaration. But the drug had proved non-habit forming, and Kirby knew that his powers of perception were not now, and never had been, affected.
He swung down further.
Just a moment after he began that progress was when things began to happen to him. First he heard what seemed to be the low titter of a human voice laughing sweetly. Next came a far off, unutterably lovely strumming of music. And then he realized that, at a depth of about a hundred feet, he was hanging level
