When he had rung off, Gibbs could see his interest was increasing. “What do you think of her falling for a bum stall like that?”

“Who?” Gibbs demanded. “Which? What stall?”

“Why, Miss Cartwright!” said Duncan. “Ain’t I talking about her?”

“Well, who is she?” the aggrieved Gibbs cried. “Is she a smuggler?”

“No. She’s a swell society girl,” said Duncan in a superior manner.

“If she ain’t a smuggler, what’s she here for then?” Gibbs had a gentle pertinacity in sticking to his point.

“The Chief wants to use her in the Denby case, so he had me write her a letter saying we’d received a package from Paris containing dutiable goods, a diamond ring, and would she kindly call this afternoon and straighten out the matter.” Duncan now assumed an air of triumph. “And she fell for a fake like that!”

“I get you,” said Gibbs. “But what does he want her for?”

“I told you, the Denby case.”

“What’s that?” Gibbs entreated.