Miss Mount’s strong, capable hands closed tightly in her lap, the first sign of emotion she had shown.

“Before my eyes,” she told them in a lower voice, “Mr. Harrison suddenly spun half-way round, flung up his arms and fell heavily into the room on his back. He gave a shout of pain and anger as he fell.”

“Where were you standing when he fell?” asked Bernard.

“I was just closing the window and turned my head.”

“So you could not see down the library?”

“No, I could not. I didn’t try immediately.”

“What did you do?”

“When Mr. Harrison fell, Susan startled me further by screaming at the top of her lungs and dropping the tray of cocktails she was carrying.”

“You poured the cocktails before the guests came down?” inquired Landis.

“We poured them immediately after the gong sounded. Mr. Harrison was a man of extremely regular habits and liked his family and guests to be on time.”