Mark Pryor followed slowly. As soon as the coast was clear, he crept cautiously up the front stoop to look at the name plate on one side of the doorway. With the aid of a pocket flashlight, he read the words: "Japanese Consulate General."

"What in thunder has the Mikado got to do with Hutchins Burley's smuggling adventures?" he asked himself, greatly perplexed.

An hour or so later, he repeated this query to a brisk, florid-faced gentleman in the prime of life who was seated in what purported to be an actor's agency in the heart of Times Square. The florid gentleman, who looked much less like a theatrical agent than like a military man in mufti, offered no solution to the enigma.

"Major Blair, I think I'm on the trail of something big at last," volunteered Mr. Pryor, hopefully.

"Possibly, sir, possibly," replied the gentleman, briskly.

But he paid only a languid attention to his visitor's spirited account of how he had gradually wormed himself into the confidence of Hutchins Burley. When Pryor finished, he said:

"Somebody else will have to take up the trail of Burley. Orders came from headquarters this evening that you are to sail for France the day after tomorrow. You will report in Paris to Colonel Scott at the address in this letter."

"Foiled again," exclaimed Pryor, veiling his real feelings with assumed good humor. "Whenever I'm on the point of nailing a case down, headquarters steps in and calls a halt, as if I were the villain in the piece."

He added sardonically: "What is the use of information fairly breezing into my hands, so long as headquarters' notion of Secret Service is that the only conduct becoming an officer or a gentleman is to keep a secret dark."

"Mr. Pryor, orders are orders! The first duty of an officer of the Secret Service is never to ask questions."