“Well, in a sense, I don’t say we haven’t been keeping something back. But I give you my word that we’re not in collusion with the murderer or anything of that sort. There is a very special reason why we can’t tell you quite everything just now—for what it is worth.”

“Does the very special reason apply to Miss Cowper as well?”

“Yes,” said Joan; “for the moment it does.”

Ellery went on. “Of course, I know you have a grievance. You’re going to tell us that we are abetting the criminal, whoever he is, and that we shall be getting into trouble if we’re not careful.”

“So you will,” said the inspector. “Very serious trouble.”

“All the same, inspector, I’m afraid we must risk it. Very likely we shall be free to tell you the whole story, or what we know of it, in a day or two. But we won’t tell you now. That’s flat.”

“A day or two is ample time for a criminal to get away.”

“Maybe; but I don’t think you need worry about that. You’ve given him enough time to get away if he wants to. In any case, we are not going to tell you. I’m sorry, but——”

“I warn you that you are conspiring to defeat the ends of justice.”

“Sorry, and all that. Another time, inspector, we shall look forward to an interesting talk. But for the present—Good-morning.”