There is very little evidence to show that mediumship arose anywhere spontaneously,' but those who sat with the Foxes were often found to become mediums themselves and then in their turn developed mediumship in others.
The mere reading of accounts of seances developed the peculiar susceptibility in some persons, while others, who became mediums ultimately, did so only after prolonged and patient waiting.
I have refracted it with Prismes, and reflected it with Bodies, which in Day-light were of other colours; I have intercepted it with the coloured film of Air interceding two compressed plates of glass, transmitted it through coloured Mediums, and through Mediums irradiated with other sorts of Rays, and diversly terminated it; and yet could never produce any new colour out of it.
Daniel Dunglas Home, the next medium of importance who appeared in London, came over from America in 1855; and for many years almost all the chief mediums for physical phenomena known in England came from the United States.
The interest in spiritualism, apart from scientific curiosity and mere love of the marvellous, is partly due to the belief that trustworthy information and advice about mundane matters can be obtained through mediums - to the same impulse in fact which has in all ages attracted inquirers to fortune-tellers.