access to the Vandam mansion, that you substituted the deadly for
the harmless capsules. Don't forget that your rappings announced
the death of one of your victims and urged the other, a cruelly
wronged and credulous old man, to leave millions to you who had
deceived and would have killed him.

"No, the record of the ghost on the seismograph was not Mr.
Farrington's, as I implied at the moment when you so kindly
furnished this additional proof of your guilt by trying to
destroy the evidence. The ghost was you, Mrs. Popper, and you are
at liberty to examine the markings as minutely as you please, but
you must not destroy them. You are an astute criminal, Mrs.
Popper, but to-night you are under arrest for the murder of Mary
Vandam and the attempted murder of Henry Vandam."



VI. The Diamond Maker

"I've called, Professor Kennedy, to see if we can retain you in a
case which I am sure will tax even your resources. Heaven knows
it has taxed ours."

The visitor was a large, well-built man. He placed his hat on the
table and, without taking off his gloves, sat down in an easy
chair which he completely filled.

"Andrews is my name--third vice-president of the Great Eastern
Life Insurance Company. I am the nominal head of the company's
private detective force, and though I have some pretty clever