"Look behind you!" said the stranger, sharply.
Brooke, too strung up to recognize the risk of the proceeding, swung round almost before he heard him, and then gasped with consternation, for Barbara stood in the entrance holding up a light. She was, however, not quite defenseless, as Brooke realized when he saw the gleaming pistol in her hand. Next moment his folly, and the fact that the stranger had also seen it, became evident, for there was a hasty patter of feet, and when Brooke turned again he had almost gained the other door of the room. Barbara, who had moved forward in the meanwhile, however, now stood between him and it, and turning half round he raised the pistol menacingly. Then with hand clenched hard upon the bar Brooke sprang.
There was a flash and a detonation, the acrid smoke drove into his eyes, and he fell with a crash against the door, which was flung to in front of him. He had, as he afterwards discovered, struck it with his head and shoulder, but just then he was only sensible of an unpleasant dizziness and a stinging pain in his left arm. Then he leaned somewhat heavily against the door, and he and the girl looked at each other through the filmy wisps of smoke that drifted athwart the light, while a rapid patter of footsteps grew less distinct. Barbara was somewhat white in face, and her lips were quivering.
"Are you hurt?" she said, and her voice sounded curiously strained.
"No," said Brooke, with a little hollow laugh. "Not seriously, anyway. The fellow flung the door to in my face, and the blow must have partly dazed me. That reminds me that I'm wasting time. Where is he now?"
Barbara made a little forceful gesture. "Halfway across the clearing, I expect. You cannot go after him. Look at your arm."
Brooke turned his head slowly, for the dizziness he was sensible of did not seem to be abating, and saw a thin, red trickle drip from the sleeve of his jean jacket, which the moonlight fell upon.
"I scarcely think it's worth troubling about. The arm will bend all right," he said. "Still, perhaps, you wouldn't mind very much if I took this thing off."
He seized the edge of the jacket, and then while his face went awry let his hand drop again.
"It might, perhaps, be better to cut the sleeve," he said. "Could you run this knife down the seam? The jean is very thin."