“Nobody knows about it except the Germans and the Japanese.”

“Who is this Sanang?” he demanded.

“A Yezidee-Mongol. He is one of the Sheiks-el-Djebel—a servant of The Old Man of Mount Alamout.”

“What is he?”

“A sorcerer—assassin.”

“What!” exclaimed Cleves incredulously.

“Why, yes,” she said, calmly. “Have you never heard of The Old Man of Mount Alamout?”

“Well, yes——”

“The succession has been unbroken since 1090 B.C.A Hassan Sabbah is still the present Old Man of the Mountain. His Yezidees worship Erlik. They are sorcerers. But you would not believe that.”

Cleves said with a smile, “Who is Erlik?”