After a batch of preliminary business had been transacted, Ferguson arose and cleared his throat. The directors leaned forward in their chairs expectantly. The page boys lost their mechanical attitude for the instant and fairly craned their necks around the bulks of the forms in front of them. "The Darrow case has taken a sudden and sinister turn," said the president. "I have a letter. I will read it: "Old Perk: Get wise to yourself. We are in a position to destroy you and all the pot-bellies in the Wall Street crowd. If you want to die of old age, remember what happened to Darrow and begin declaring us in on Wall Street dividends. If you do not you will follow Darrow in the same way. "Our first demand is for $100,000. Leave this amount in hundreds and fifties in the rubbish can at the corner of 50th Street and Broadway at 10 A. M. next Thursday. If you fail we will break your damned neck. Bring the police with you if you like. Invisible Death. * * * * * Ferguson passed the letter around for inspection. It was painstakingly printed, evidently from the type in a rubber stamp set such as is sold in toy stores. "I have decided," said Perkins at length, "to give this case to Walter Lees. He has never failed us in mechanical, chemical, or any form of scientific problem. I hope he will not fail in this. He will work independently of the police, who have requested that we keep the appointment at 50th Street and Broadway at the hour named. We will deposit a roll of newspapers, around which has been wrapped a fifty dollar bill and then we will stand by while the awaiting detectives do their duty." "You do not think anyone is going to call for any supposed package of money at one of the most congested corners in the world in broad daylight?" asked a director at the end of the table. "Why not?" asked Ferguson. "A seedy individual could pick a package from a rubbish bin at that corner without attracting the least attention." "I guess you're right," agreed the doubting one. "I know I'm right," said the president. And he usually was. "I have already arranged to have Lees instructed in his work," Ferguson volunteered as a pause came in the buzz of conversation about the table. "Lees is young, but he is capable." There was general discussion of the strange case of Darius Darrow; the room filled with the blue haze of many cigars. Suddenly a low, humming sound was heard in the room. Papers on the directors' table were bunched as if by unseen hands, and thrown to the ceiling, from which they descended like flakes of snow and scattered about the room. A book of minutes was torn from the hands of a secretary. It was raised and brought down on vice-president Farnsworth's head. A chair was pulled out from under another direction and he was deposited in an undignified heap on the floor.