The materializing was done through sliding panels in the walls, while the believers sat holding hands about the opposite side of a table, and loudly singing sacred hymns.  They had the only door to the room locked and sealed, and never dreamed that the spirits who brought the quartz from the mine were mules.

Thousands of dollars were invested in this “spirit mine,” the believers stacking their money on the quartz as it lay on the table at a dark seance, and receiving deeds in return for their money, which the spirits dematerialized.

The medium established, or had his spirits establish, a “Treasury of Heaven,” for the faithful to deposit their money in, and on which they were to receive fifty per cent interest.  This interest the believers continued to receive at dark seances from the spirits for a time.  Each sitter’s interest was found on the table stacked in front of him when the lights were lighted.  When the spirit bank became insolvent and the chief medium disappeared, the believers were out about thirty-five thousand dollars.

No less a personage than a millionaire of Tacoma, Washington, is said to have contributed largely to this spirit fund.  I had known of this case for some time before the exposure (conducted by a performer engaged for the purpose), and knew that certain interested persons were contemplating bringing it about, in order to rescue certain estimable persons from the clutches of these mediums.  This was successful; and the confederates of the medium signed written confessions in the presence of one of the most devout of the believers, and a gentleman who is otherwise very intelligent.  Upon this the gentleman was greatly crestfallen, but he still insists that there are certain mediums who are not impostors; and that certain mediums in Chicago who produce spirit portraits are genuine.

A full and very interesting account of this exposure is given in the San Francisco Examiner of March 3 and 4, 1907.

. . . . .

I could report enough cases of materialization to fill a volume.  These I know of, from various sources, and in every case they were invariably fraudulent.  I will give a short account of a materialization which a very expert medium, who is on friendly terms with me, witnessed.  The gentleman was originally a minister, and afterwards began investigating spiritualism, as he was a believer in it.  He hoped to become a medium; and at one time paid two lady mediums of some renown, who reside in Chicago, three dollars a sitting for three sittings a week.  These sittings were conducted for the purpose of developing this gentleman in mediumship.  He continued this for a long time, but he was no nearer to being a medium than he was in the beginning.

At one time he detected one of the sisters passing a slate to the other, and substituting another in its place.  He saw the edge of one of the slates protruding from behind the dress of one of the sisters.  They never knew they were discovered as he said nothing, but this “opened his eyes.”  After this he investigated everywhere, and at every opportunity, and grew to be a very expert medium himself.