Gladstone would defend it, but he would not go out of his way to dwell on it.
It is an excellent working model of what I mean by finding an unexpected support, and finding it in an unexpected quarter.
It is not theological but psychological study that has brought us back into this dark underworld of the soul, where even identity seems to dissolve or divide, and men are not even themselves.
I do not say that psychologists admit the discovery of demoniacs; and if they did they would doubtless call them something else, such as demono-maniacs.

But they admit things which seem almost as near to a new supernaturalism, and things quite as incredible to the old rationalism.

Dual personality is not so very far from diabolic possession.

And if the dogma of subconsciousness allows of agnosticism, the agnosticism cuts both ways.
A man cannot say there is a part of him of which he is quite unconscious, and only conscious that it is not in contact with the unknown.
He cannot say there is a sealed chamber or cellar under his house, of which he knows nothing whatever; but that he is quite certain that it cannot have an underground passage leading anywhere else in the world.
He cannot say he knows nothing whatever about its size or shape or appearance, except that it certainly does not contain a relic of the finger-joint of St.Catherine of Alexandria, or that it certainly is not haunted by the ghost of King Herod Agrippa.
If there is any sort of legend or tradition or plausible probability which says that it is, he cannot call a thing impossible where he is not only ignorant but even unconscious.

It comes back therefore to the same reality, that the old compact cosmos depended on a compact consciousness.