The scientist turned to Vance.
"I am sure you are telling the truth," he said. "I feel certain the mirror is harmless." His tone was silky. A thin smile rippled across his aged face.
He was like a cat playing with a mouse.
"Only our friend, young Mr. Carter, remains to be convinced," he went on. "However, we shall have no difficulty in proving him wrong."
Adrian Vance stared at the professor in terrified fascination. His lips moved, but no words came.
The savant hurried across to an ancient desk which stood in one corner. Rummaged through it. Came back with a big sheet of heavy paper.
"Over there," said the professor—gesturing toward the spot where the mirror still stood upon the easel, again shrouded by the tablecloth—"is the glass that has caused all the trouble."
He smiled sympathetically at Vance.
"All so unnecessary, too, Adrian!"
"Unnecessary?"