"A suit-case!" exclaimed Parker. "Why a suit-case?"
"Why indeed? I think we may assume that it didn't stay here very long. It would have been exceedingly visible in the daytime. But somebody might very well have shoved it in here if they were caught with it—say at three o'clock in the morning—and didn't want it to be seen."
"Then when did they take it away?"
"Almost immediately, I should say. Before daylight, anyhow, or even Inspector Craikes could hardly have failed to see it."
"It's not the doctor's bag, I suppose?"
"No—unless the doctor's a fool. Why put a bag inconveniently in a damp and dirty place out of the way when every law of sense and convenience would urge him to pop it down handy by the body? No. Unless Craikes or the gardener has been leaving things about, it was thrust away there on Wednesday night by Gerald, by Cathcart—or, I suppose, by Mary. Nobody else could be supposed to have anything to hide."
"Yes," said Parker, "one person."
"Who's that?"
"The Person Unknown."
"Who's he?"