On the next afternoon at 3, Turpin and the captain crept softly up the stairs of No. 345 Blank Street.  A dozen plain-clothes men, dressed in full police uniforms, so as to allay suspicion, waited in the hall below.

At the top of the stairs was a door, which was found to be locked.  The captain took a key from his pocket and unlocked it.  The two men entered.

They found themselves in a large room, occupied by twenty or twenty-five elegantly clothed ladies.  Racing charts hung against the walls, a ticker clicked in one corner; with a telephone receiver to his ear a man was calling out the various positions of the horses in a very exciting race.  The occupants of the room looked up at the intruders; but, as if reassured by the sight of the captain’s uniform, they reverted their attention to the man at the telephone.

“You see,” said the captain to Turpin, “the value of an anonymous letter!  No high-minded and self-respecting gentleman should consider one worthy of notice.  Is your wife among this assembly, Mr. Turpin?”

“She is not,” said Turpin.

“And if she was,” continued the captain, “would she be within the reach of the tongue of slander?  These ladies constitute a Browning Society.  They meet to discuss the meaning of the great poet.  The telephone is connected with Boston, whence the parent society transmits frequently its interpretations of the poems.  Be ashamed of yer suspicions, Mr. Turpin.”

“Go soak your shield,” said Turpin.  “Vivien knows how to take care of herself in a pool-room.  She’s not dropping anything on the ponies.  There must be something queer going on here.”

“Nothing but Browning,” said the captain.  “Hear that?”

“Thanatopsis by a nose,” drawled the man at the telephone.

“That’s not Browning; that’s Longfellow,” said Turpin, who sometimes read books.

“Back to the pasture!” exclaimed the captain.  “Longfellow made the pacing-to-wagon record of 7.53 ’way back in 1868.”

“I believe there’s something queer about this joint,” repeated Turpin.

“I don’t see it,” said the captain.

“I know it looks like a pool-room, all right,” persisted Turpin, “but that’s all a blind.  Vivien has been dropping a lot of coin somewhere.  I believe there’s some under-handed work going on here.”

A number of racing sheets were tacked close together, covering a large space on one of the walls.  Turpin, suspicious, tore several of them down.  A door, previously hidden, was revealed.  Turpin placed an ear to the crack and listened intently.  He heard the soft hum of many voices, low and guarded laughter, and a sharp, metallic clicking and scraping as if from a multitude of tiny but busy objects.

“My God!  It is as I feared!” whispered Turpin to himself.  “Summon your men at once!” he called to the captain.  “She is in there, I know.”

At the blowing of the captain’s whistle the uniformed plain-clothes men rushed up the stairs into the pool-room.  When they saw the betting paraphernalia distributed around they halted, surprised and puzzled to know why they had been summoned.