“The dark one?” The Colonel smiled. “I’ve seen her: a pretty thing. What would the police want with her, Mr. Conrad?”

“Do you happen to know where they have gone?”

“They said something about the amusement park,” the Colonel said, frowning. “I believe I heard one of them say something about going for a swim.”

Conrad grimaced. He knew it would be hopeless to try and find Frances Coleman if she had gone to the amusement park. The place was always packed. He lifted his shoulders, resigned.

“Thank you, Colonel. I guess I’ll look back this afternoon.”

“You’re sure nothing’s wrong?” the Colonel asked, staring at Conrad. “I didn’t like the look of the man who followed them. He looked a rough character to me.”

Conrad stiffened to attention.

“What man, Colonel?”

The Colonel took a sip from his glass, put the glass down and wiped his mouth with his silk handkerchief.

“You mustn’t get the impression that I’m always at the window, Mr. Conrad, but it did happen I looked out as they were walking down the street, and I saw this man in a car. He drove slowly after them: a yellow-headed man; a young man, but I didn’t like the look of him at all.”