“By George!” he said under his breath.

“I thought you’d like it, sir.”

She was half invisible, and he started violently. “It’s wonderful, but I expected that.”

“Yes, it’s strange how one can tell.”

He glanced at her, as though he had known her all his life. “There is something about this room, and I felt it the first time I came in. How old is it?”

“It has no age, sir.”

Derrick did not seem surprised. “I thought you’d say that.” He paused; then as though resuming some previous talk, “Who else has felt it?”

“Only Mr. Millicent since I came here, and his daughter. It was different with Mrs. Millicent, and she was frightened.”

“I think I understand that, too. Was this his favorite room?”

“Yes, that is his desk. I think that at the end he was frightened as well.”