“I mean daggers aren’t the only things with short blades. Spears have short blades. And spears catch at the end of the steel just like daggers, if they’re that sort of fancy spear they had in theatres; like the spear poor old Parkinson killed his wife with, just when she’d sent for me to settle their family troubles—and I came just too late, God forgive me! But he died penitent—he just died of being penitent. He couldn’t bear what he’d done.”

The general impression in court was that the little priest, who was gobbling away, had literally gone mad in the box. But the judge still looked at him with bright and steady eyes of interest; and the counsel for the defence went on with his questions unperturbed.

“If Parkinson did it with that pantomime spear,” said Butler, “he must have thrust from four yards away. How do you account for signs of struggle, like the dress dragged off the shoulder?” He had slipped into treating his mere witness as an expert; but no one noticed it now.

“The poor lady’s dress was torn,” said the witness, “because it was caught in a panel that slid to just behind her. She struggled to free herself, and as she did so Parkinson came out of the prisoner’s room and lunged with the spear.”

“A panel?” repeated the barrister in a curious voice.

“It was a looking-glass on the other side,” explained Father Brown. “When I was in the dressing-room I noticed that some of them could probably be slid out into the passage.”

There was another vast and unnatural silence, and this time it was the judge who spoke. “So you really mean that when you looked down that passage, the man you saw was yourself—in a mirror?”

“Yes, my lord; that was what I was trying to say,” said Brown, “but they asked me for the shape; and our hats have corners just like horns, and so I—”

The judge leaned forward, his old eyes yet more brilliant, and said in specially distinct tones: “Do you really mean to say that when Sir Wilson Seymour saw that wild what-you-call-him with curves and a woman’s hair and a man’s trousers, what he saw was Sir Wilson Seymour?”

“Yes, my lord,” said Father Brown.