Boyd came up to them. “Good evening, gentlemen.”
“Evening, Boyd,” said Anthony.
Suddenly, “By Gad!” Sir Arthur cried, and turned a bewildered face upon them. “I didn’t think of that before!”
“Think of what, sir?” asked Boyd.
“Why, something that may change everything! Look here, that’s the window of my sitting-room up there— the one over the window of the study which you say the murderer must have got in by!”
Anthony was silent. Boyd said stolidly: “Well, sir?”
“But don’t you see, man? Don’t you see, Gethryn? I was sitting up in my room, by that window, all the time. I should have been bound to hear something. Bound to!”
“But you didn’t, sir,” said Boyd.
“Ach!” Sir Arthur turned on his heel and flung away from them and into the house.
“He’s very upset because he thinks you’ve taken the wrong man, Boyd,” said Anthony.