Suppose, too, that the event is not one which could be guessed, like the death of an invalid or the result of a race or of an election.

This would be odd enough, but the facts of which I dreamed must have been present in the minds of living people.

Now, if there is such a thing as "mental telegraphy" or "telepathy," {28} my mind, in dream, may have "tapped" the minds of the people who knew the facts.

We may not believe in "mental telegraphy," but we can _imagine_ it as one of the unknown possibilities of nature.

Again, if I dream of an unchronicled event in the past, and if a letter of some historical person is later discovered which confirms the accuracy of my dream, we can at least _conceive_ (though we need not believe) that the intelligence was telegraphed to my dreaming mind from the mind of a _dead_ actor in, or witness of the historical scene, for the facts are unknown to living man.