voice in a scarcely audible whisper pronounces his name.

"Yes, it is I," he whispers in reply. "But in the name of Heaven
who are you?"

"The Ouled-Nail of Sisi Aissa," came the answer. While she spoke
Tarzan could feel her working about his bonds. Occasionally the
cold steel of a knife touched his flesh. A moment later he was
free.

"Come!" she whispered.

On hands and knees he followed her out of the tent by the way she
had come. She continued crawling thus flat to the ground until she
reached a little patch of shrub. There she halted until he gained
her side. For a moment he looked at her before he spoke.

"I cannot understand," he said at last. "Why are you here? How
did you know that I was a prisoner in that tent? How does it happen
that it is you who have saved me?"

She smiled. "I have come a long way tonight," she said, "and we
have a long way to go before we shall be out of danger. Come; I
shall tell you all about as we go."

Together they rose and set off across the desert in the direction
of the mountains.

"I was not quite sure that I should ever reach you," she said at
last. "EL ADREA is abroad tonight, and after I left the horses I