“But it works in,” Hilliard commented. “If the driver saw what you were looking at and your expression, he would naturally guess what you had noticed, and he would warn his boss that you had tumbled to it. The manager would look surprised and annoyed for a moment, then he would see he must divert your suspicion, and talk to you as if nothing had happened.”

“Quite. That’s just what I thought. But again, I may have been mistaken.”

They continued discussing the matter for some time longer, and then the conversation turned into other channels. Finally the clocks chiming midnight aroused Merriman, and he got up and said he must be going.

Three days later he had a note from Hilliard.

“Come in tonight about ten if you are doing nothing,” it read. “I have a scheme on, and I hope you’ll join in with me. Tell you when I see you.”

It happened that Merriman was not engaged that evening, and shortly after ten the two men were occupying the same arm-chairs at the same open window, their glasses within easy reach and their cigars well under way.

“And what is your great idea?” Merriman asked when they had conversed for a few moments. “If it’s as good as your cigars, I’m on.”

Hilliard moved nervously, as if he found a difficulty in replying. Merriman could see that he was excited, and his own interest quickened.

“It’s about that tale of yours,” Hilliard said at length. “I’ve been thinking it over.”

He paused as if in doubt. Merriman felt like Alice when she had heard the mock-turtle’s story, but he waited in silence, and presently Hilliard went on.