"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 deductions to be drawn! You've made it quite clear now, sir. The man tappit at that windie——"
"Steady, steady!" said Carrington, smiling and yet seriously. "Don't you go announcing that theory! If there's anything in it—mum's the word! But mind you, Bisset, it's only a bare possibility. There's no good evidence against the door theory yet."
"Not the table being cowpit and the body moved?"
"They might be explained."
He was thoughtful for a moment and then said deliberately:
"I want—I mean you want certain evidence to exclude the door theory. Without that, the window theory remains a guess. Sir Malcolm is in London, I understand?"
"Yes, sir."
"Likely to be coming north soon?"
"No word of it, sir."
Mr. Carrington reflected for a moment and then rose and went towards the window.