P. T. Barnum,
The Humbugs of the World — Chapter XVII
(1866)
“ Those skeptics who were present when the lamp-black was “transferred” from the gentleman’s hair to the medium’s hand, rashly concluded that the boy was an impostor. It remained for Mr. Hall—that is the philosopher’s name—to make the “electro-magnetic transfer” discovery. The Allen boy ought ever to hold him in grateful remembrance for coming to his rescue at such a critical period, when the spirits would not vouchsafe an explanation that would exculpate him from the grievous charge of imposture. Mr. Hall deserves a leather medal now, and a soapstone monument when he is dead. ”
