by Mr_Grue » Jan 27th, '09, 21:31
I thought it was in Waters but it might have been on Max Maven's Nothing. Psychometry evolved first from a process where the reader forced cards to a number of people. These were placed in containers, mixed, read and returned to the correct choosers. Later, the subjects were asked to place a personal object and a (forced) playing card in the containers, so both card and object was read (the fun here being that the forced cards effectively became a way to mark the objects). Then, as it became apparent that, if you were going to use containers anyway, you'd be better off marking the containers and dispensing with the playing cards all together, the solely object-orientated psychometry came about. Presumably along this continuum the notion of picking up vibrations from the objects came to replace the more tarot-esque notion of selected cards revealing the character of the subject.
I may have that fudged up, but am sure I'll be corrected if that's the case.