"Mario Escobar has vanished."
"But I saw him myself," Hillyard exclaimed. "I saw him in London."
"When?"
"On Monday afternoon."
Graham lifted the mouthpiece to his lips again.
"Wait a bit, A.C. Hillyard saw the man in London on Monday afternoon."
Again A.C. spoke at the other end from an office in Scotland Yard. Graham put down the instrument with a bang and hung up the receiver.
"He vanished yesterday. Could he have seen you?"
Hillyard shook his head.
"I think not."