"Impossible; it cannot be!" groaned Schwan.

"I will conduct the gentlemen," said Robeckal, coming forward.

"Scoundrel!" muttered the host, while Robeckal preceded the policemen up the stairs, and pointed to Girdel's room.

"Open!" cried the brigadier, knocking at the door with the hilt of his sword.

As no answer came, he burst open the door, and then uttered an oath.

"Confound them—they have fled!" exclaimed Robeckal.

"Yes, the nest is empty," said the brigadier; "look, there at the window, the bed-sheets are still hanging with which they made their escape."

"You are right," growled Robeckal; "but they cannot be very far off yet."

"No; quick—to horse!" cried the brigadier to his men; and while they got into the saddle, Robeckal looked in the stables and discovered the loss of the two horses. The tracks were soon found, and the pursuers, with Robeckal at the head, quickly gained the forest. But here something singular happened. The brigadier's horse stumbled and fell, the horse of the second policeman met with the same accident, and before the end of two seconds two more horses, together with their riders, lay on the ground. All four raged and cried in a horrible manner; one of them had broken a leg, the brigadier's sword had run into his left side, and two horses were so badly hurt that they had to be killed on the spot.

"The devil take them!" cried Robeckal, who was looking about with his lantern to discover the cause of these accidents, "the scoundrels have drawn a net of thin cords from one tree to the other."