In 1920 the whole spiritual world was trembling under the thundering shock of the Red Surf pounding the frontiers of civilisation from pole to pole.

Up out of the hell-pit of Asia had boiled the molten flood, submerging Russia, dashing in giant waves over Germany and Austria, drenching Italy, France, England with its bloody spindrift.

And now the Red Rain was sprinkling the United States from coast to coast, and the mindless administration, scared out of its stupidity at last, began a frantic attempt to drain the country of the filthy flood and throw up barriers against the threatened deluge.

In every state and city Federal agents made wholesale arrests—too late!

A million minds had already been perverted and dominated by the terrible Sect of the Assassins. A million more were sickening under the awful psychic power of the Yezidee.

Thousands of the disciples of the Yezidee devil-worshipers had already been arrested and held for deportation,—poor, wretched creatures whose minds were no longer their own, but had been stealthily surprised, seized and mastered by Mongol adepts and filled with ferocious hatred against their fellow men.

Yet, of the Eight Yezidee Assassins only two now remained alive in America,—Togrul, and Sanang, the Slayer of Souls.

Yarghouz was dead; Djamouk the Fox, Kahn of the Fifth Tower was dead; Yaddin-ed-Din, Arrak the Sou-Sou, Gutchlug, Tiyang Khan, all were dead. Six Towers had become dark and silent. From them the last evil thought, the last evil shape had sped; the last wicked prayer had been said to Erlik, Khagan of all Darkness.

But his emissary on earth, Prince Sanang, still lived. And at Sanang’s heels stole Togrul, Tougtchi to Sanang Noïane, the Slayer of Souls.