"Well, but what were those people laughing at?" asked Moncharmin.

"They must have been dining, sir, and seemed more inclined to lark about than to listen to good music. The moment they entered the box, they came out again and called the box-keeper, who asked them what they wanted. They said, 'Look in the box: there's no one there, is there?' 'No,' said the woman. 'Well,' said they, 'when we went in, we heard a voice saying THAT THE BOX WAS TAKEN!'"

M. Moncharmin could not help smiling as he looked at M. Richard; but M. Richard did not smile. He himself had done too much in that way in his time not to recognize, in the inspector's story, all the marks of one of those practical jokes which begin by amusing and end by enraging the victims. The inspector, to curry favor with M. Moncharmin, who was smiling, thought it best to give a smile too. A most unfortunate smile! M. Richard glared at his subordinate, who thenceforth made it his business to display a face of utter consternation.

"However, when the people arrived," roared Richard, "there was no one in the box, was there?"

"Not a soul, sir, not a soul! Nor in the box on the right, nor in the box on the left: not a soul, sir, I swear! The box-keeper told it me often enough, which proves that it was all a joke."

"Oh, you agree, do you?" said Richard. "You agree! It's a joke! And you think it funny, no doubt?"

"I think it in very bad taste, sir."

"And what did the box-keeper say?"

"Oh, she just said that it was the Opera ghost. That's all she said!"

And the inspector grinned. But he soon found that he had made a mistake in grinning, for the words had no sooner left his mouth than M. Richard, from gloomy, became furious.