“He didn’t supply you with very much fuel.”

“My word! I think he did unbelievably well,” said Vance. “He unearthed the very information we wanted.”

We wanted?” echoed Markham. “I have more important things to think about than Pfyfe’s amours.”

“And yet, y’ know, this particular amour of Pfyfe’s is going to solve the problem of Benson’s murder,” replied Vance; and would say no more.

Markham, who had an accumulation of other work awaiting him and numerous appointments for the afternoon, decided to have his lunch served in the office; so Vance and I took leave of him.

We lunched at the Élysée, dropped in at Knoedler’s to see an exhibition of French Pointillism, and then went to Aeolian Hall where a string quartette from San Francisco was giving a programme of Mozart. A little before half past five we were again at the District Attorney’s office, which at that hour was deserted except for Markham.

Shortly after our arrival Miss Hoffman came in, and told the rest of her story in direct, business-like fashion.

“I didn’t give you all the particulars this morning,” she said; “and I wouldn’t care to do so now unless you are willing to regard them as confidential, for my telling you might cost me my position.”

“I promise you,” Markham assured her, “that I will entirely respect your confidence.”

She hesitated a moment, and then continued.