"He went off with Mr. Holmes after we got inside the house," said Bessie. "But I didn't see him again after that. He wasn't with Mr. Holmes in the big hall again, after I had got away. I'm sure of that."

"What are you going to do now?" asked Bessie.

"I'm not certain. I'd like very much to know where the other girls are. We ought to be all together."

"Perhaps I can find out," said Bessie. "You stay here, and I'll slip along toward the house. If Dolly's awake, I can find out where she is."

"All right. But if you see anyone else, or if anyone interferes with you, call me right away."

Bessie promised that she would, and then she slipped away, and a moment later found herself in front of the house.

"I'll try this side last," she said to herself. "I don't believe they'd put them in front—more likely they'd put them on the east side, because that only looks out over the garden, and there'd be less chance of their seeing anyone who was coming."

So, moving stealthily and as silently as a cat, she went around to that side of the house, and a moment later the strange, mournful call of a whip-poor-will sounded in the still night air. It was repeated two or three times, but there was no answer. Then Bessie changed her call slightly.

At first she had imitated the bird perfectly. But this time there was a false note in the call—just the slightest degree off the true pitch of the bird's note. Most people would not have known the difference, but to a trained ear that slight imperfection would be enough to reveal the fact that it was a human throat that was responsible, and not a bird's. And the trick served its turn, for there was an instant answer. A window was opened above Bessie, very gently, and she saw Dolly's head peering down over the ivy that grew up the wall.

"Wait there!" she whispered. "Get dressed, all three of you! Mr. Jamieson is here—not far away. I'm going to tell him where you are."