"Why not come to dinner?"
"Thanks all the same, but I think it would serve my purpose better if I came later."
Dr. Cairn and his son dined alone together in Half-Moon Street that night.
"I saw Antony Ferrara in Regent Street to-day," said. Robert Cairn. "I was glad to see him."
Dr. Cairn raised his heavy brows.
"Why?" he asked.
"Well, I was half afraid that he might have left London."
"Paid a visit to Myra Duquesne in Inverness?"
"It would not have surprised me."