“You don’t think⁠—but, say, that’s plumb impossible⁠—no one could have got in.”

“No,” admitted the lawyer. “I don’t see how they could. And yet⁠—she is on the point of betraying Mr. Brown, and⁠—she dies. Is it only chance?”

“But how⁠—”

“Yes, how ! That is what we must find out.” He stood there silently, gently stroking his chin. “We must find out,” he said quietly, and Tuppence felt that if she was Mr. Brown she would not like the tone of those simple words.

Julius’s glance went to the window.

“The window’s open,” he remarked. “Do you think⁠—”

Tuppence shook her head.