“The climate,” and Nick grinned and winked. “Where did you hear of the Undine?”

“The what?”

“The Undine.”

“Never did hear of it.”

“What was the name of the yacht you boarded to-night?”

“Dunno.”

“How did you happen to know so well where she was?”

“Rattler an' me took a tour of inspection this afternoon.”

“Ah! Is river piracy your business when you're at home?”

“Mostly.”