Letter from Dr Peter Wadhams to Michael Roll (November 11, 2000): Experimental Proof of Survival after Death

In his letter, Dr Wadhams writes:
"There was no question about the seriousness of [Sir William Crookes'] psychic investigations, and his endorsement of Katie King represented a real challenge to science. It was a challenge which science flunked, of course, perhaps because conventional scientists were being asked to swallow too much too quickly."

E-mail from Michael Roll to New Scientist (March 9, 2005): The Discovery of People in the Invisible Part of the Universe

In his e-mail, Michael Roll writes:
"I consider the "Cleaver Report" to be one of the most important scientific experiments ever. This is because he carried out the experiment in 1982 that Sir William Crookes was unable to do in 1874."