With infinite precautions he loosened and threw off his outer garment. He flung it, with the dart still adhering, down over the cliff.

“Look, Frumuos!” he commanded. “Search carefully and see if there be any scratch on the skin!”

The man obeyed, making a minute inspection through his mica eye-shields. Then he shook his head.

“No, Kromno,” he answered. “I see nothing. But the arrow came near, near!”

Stern, tremendously relieved, gestured toward the caves.

“Go swiftly!” he commanded. “Bring up every man who still can fight. All must have full burdens of cartridges. Even though the bridge be down, the enemy will still attack!”

“But how, since the great river lies between?”

“They can climb down those cliffs and swim the river and scramble up this side as easily as we can walk on level ground. Go swiftly! There is no time to lose!”

“I go, master. But tell me, the two who have already reached this side--shall we not first slay them?”

Allan thought. For the first time he now realized clearly the terrible peril that lay in these two Anthropoids already inside the limits of the colony.