It was originally published in Unknown Fantasy Fiction of September 1940, under the title "The Devil Makes the Law".

One day Archie is the subject of a shakedown by a sleazy character who seems to be operating a protection racket based on magic.

After scaring the criminal off by exploiting his obvious superstitions (helped by the display of a conveniently concealed handgun), Archie goes to see his friend Jedson, who uses magic to operate a clothing business.

Jedson is disappointed to find that the result is simply a copy of an existing design owned by somebody else, so he cannot use it.

They discover the man's body, ripped from shoulder to groin as if by the talons of a huge bird, the gouges being filled with a stinking ichor.

A large, handsome African impeccably dressed in an expensive business suit, holding a string of degrees from prestigious institutions, Dr. Royce Worthington can find and neutralize black magic.

He eventually announces that he has found a lot of unusual magic, but that he will leave his grandfather (a shrunken head) behind to watch over things.

There is also a new "one stop shopping" company calling itself "Magic, Inc." which hires magicians and finds them work.

Jedson discovers that a bill in the State Legislature, intended to regulate magicians, would give Ditworth monopoly power.

They go to the State Capitol to try to head off this law, but are outwitted by Ditworth, who manages to get the bill attached to a major public works project, making its passage unstoppable.

They hatch a plan to enter the Half World, the realm of demons and Old Nick himself, to challenge Ditworth.

Faced with seemingly endless legions of horrific creatures, Royce and Archie, helped by Mrs. Jennings' cat, travel up and down the rows.

Old Nick announces that the FBI man has to stay behind for his special attention, but after a challenge from Amanda, who seems capable of taking on him and all his legions, he thinks better of it.

The FBI man tells them he was working Ditworth's scams from another angle and had become trapped in the Half World.

The FBI man, now in human form with a snappy suit and fedora hat, bids them a quick goodbye as he leaves to report back to the Bureau.