minutes? It might help us to realise the whole thing."
This suggestion pleased Mr. Bisset greatly and in a minute or two the candles were lit and the curtains drawn.
"Put the table where it stood," said Carrington. "Now which was Sir Reginald's chair? This?"
He sat in it and looked slowly round the darkened, candle-lit library.
"Now," said he, "suppose I was Sir Reginald, and there came a tap at that window, what would I do?"
"If you were the master, sir, you'd go straight to the windie to see who it was."
"I wouldn't get in a funk and ring the bell?"
"No fears!" said Bisset confidently.
"And any one who knew Sir Reginald at all well could count on his not giving the alarm then if they tapped at the window?"
"They could that."
Carrington looked attentively towards the window.
"Those curtains hang close against the window, I see," he observed. "A very slight gap in them would enable any one to get a good view of the room, if the blinds were not down. Were the blinds down that night?"
Bisset slapped his knee.
"The middle blind wasn't working!" he cried. "What a fool I've been not to think on the extraordinar' significance of that fac'! My, the deduc-
