This exclamation fell from the lips of the foremost man of three who were descending the narrow stairs. The outcry was caused at seeing two forms gliding across the stone floor toward the stairs.

"Quick! Hold up there, or we fire!" cried a sharp voice. Then the three men rapidly descended to the floor and confronted Nell and the detective. Three revolvers were leveled, and death literally stared brother and sister in the face.

"Caught, by the powers," sneered lips above a massive red beard, and Professor Darlington Ruggles' eyes glittered with intense satisfaction as they peered into the face of the famous railroad detective.

Had Dyke Darrel been in the full vigor of his manly strength, and Nell not by to unnerve him, his chances for escape would have been tenfold greater.

As it was, a terrible weakness oppressed him. His fall into the basement had jarred him terribly, and it was with difficulty that he could stand alone. The walls seemed to whirl about in a mad waltz, and the faces of the three villains seemed one mass of grinning demons.

"Halt!"

Nell Darrel, white as death, yet with the fires of a resolute purpose blazing in her eyes, thrust forward her pistol.

"It's pretty Nell on a lark!" exclaimed Professor Ruggles. "It will be better for you not to make any resistance, for the moment you attempt it, that moment death will come to both of you. Be wise in time."

The Professor advanced a step.

"Stop there," sternly ordered the girl.