“What’s that, Bert?” asked Dot idly, not because she cared about knowing, but just for something to say.

“Looks like a dentist’s drill to me,” remarked Jardin, with a shudder.

But Chase was holding it up, examining it closely, his eyes staring with unbelief. He had made a discovery!

“I’m going to investigate this place!” he announced, putting the little instrument into his pocket. “See you later.” And he went out of the front door.

“Now what do you suppose—?” began Dot, but she stopped abruptly, for at that moment a door at the back opened and Long came into the room. He, like Jardin, was wearing a linen suit, and a big hat, but there was no mistaking the man. As Linda and Dot had insisted, he was none other than Leslie Sprague!

If he was startled by the sight of the two aviatrixes, he did not betray the fact by his expression. Whatever he felt, he covered his surprise by a grin.

“Afternoon, Jardin,” he said, calmly shaking hands. “How are you?”

“Afternoon, Long,” replied the agent, looking questioningly at the girls.

“How do you do, Mr. Leslie Sprague?” asked Dot, triumphantly.

Sprague shrugged his shoulders and laughed.