"Enough to keep every person on Mr. Sanderson's invitation list under strictest observation until—the pot boils over," Dundee replied.

"When do you want them to get on the job?"

"As soon as they can do so, after you get back to your office."

"Are they to follow the whole gang clear out to the Selim house?"

"Most decidedly! After the unwilling guests are safely within the house, your boys must guard the premises so that no one leaves without permission."

"That's all as good as done," Strawn assured him. "Now—about them inquiries you asked me to make yesterday of the secretary of the American Legion." He drew a scrap of paper from his breast pocket. "I find that John Drake, Peter Dunlap and Clive Hammond were all in service, in the ——th Division, which was held up late in January, 1918, for nearly two weeks, in Hoboken, before the War Department could get transports to send 'em to France. Miles, who enlisted the day war was declared, was wounded and shipped home late in 1917. He was discharged as unfit for further service—spinal operation—from a New Jersey base hospital on January 12, 1918. Furthermore, Judge Marshall was in New York the whole winter of 1917-'18, attached to the Red Cross in some legal capacity. He donated his services and—"

"All that doesn't matter now, Captain, but thanks just the same," Dundee interrupted. "Now if you will both excuse me, I've got a lot of work to do before five o'clock today!"

Dundee had not exaggerated. That Monday was one of the busiest days he had ever spent in all the twenty-seven years of his life. He began, rather strangely, by visiting half a dozen of Hamilton's hardware stores, exhibiting a peculiar instrument and making annoying inquiries as to when and to whom it had been sold. But at his sixth port of call success so completely rewarded his efforts that he was jubilant when he bade the mystified proprietor good day, a signed statement reposing in his wallet.

Two other calls—both in office buildings—took up only an hour of his time, and a taxicab delivered him at Police Headquarters just as the factory whistles were sirening the news that it was twelve o'clock.

He was lucky enough to find the fingerprint expert, Carraway, in his cubbyhole of an office, his desk almost crowded out by immense filing cabinets.