us in some particular transaction the evening before. They lose and regain their proper identity perhaps half a dozen times in this rambling way; nor are we able (though we are somewhat incredulous and surprised at these compound creations) to detect the error, from not being prepared to trace the same connected subject of thought to a number of varying and successive ramifications, or to form the idea of a whole. We think that Mr. Such-a-one did so and so: then, from a second face coming across us, like the sliders of a magic lantern, it was not he, but another; then some one calls him by his right name, and he is himself again. We are little shocked at these gross contradictions; for if the mind was capable of perceiving them in all their absurdity, it would not be liable to fall into them. It runs into them for the same reason that it is hardly conscious of them when made.

"That which was now a horse, a bear, a cloud, Even with a thought the rack dislimns,

And makes it indistinct as water is in water."

The difference, so far then, between sleeping and waking seems to be, that in the latter we have a greater range of conscious recollections, a larger discourse of reason, and associate ideas

in longer trains and more as they are connected one with another in the order of nature; whereas in the former, any two impressions, that meet or are alike, join company, and then are parted again, without notice, like the froth from the wave. So in madness, there is, I should apprehend, the same tyranny of the imagination over the judgment; that is, the mind has slipped its cable, and single images meet, and jostle, and unite suddenly together, without any power to arrange or compare them with others, with which they are connected in the world of reality. There is a continual phantasmagoria: whatever shapes and colours come together are by the heat and violence of the brain referred to external nature, without regard to the order of time, place, or circumstance. From the same want of continuity, we often forget our dreams so speedily if we cannot catch them as they are passing out at the door, we never set eyes on them again. There is no clue or thread of imagination to trace them by. In a morning sometimes we have had a dream that we try in vain to recollect; it is gone, like the rainbow from the cloud. At other times (so evanescent is their texture) we forget that we have dreamt at all; and at these times the mind seems to have been a mere blank, and sleep presents only

an image of death. Hence has arisen the famous dispute, Whether the soul thinks always ?on which Mr. Locke and different writers have bestowed so much tedious and unprofitable discussion; some maintaining that the mind was like a watch that goes continually, though more slowly and irregularly at one time than another; while the opposite party contended that it often stopped altogether, bringing the example of sound sleep as an argument, and desiring to know what proof we could have of thoughts passing through the mind, of which it was itself perfectly unconscious, and retained not the slightest recollection. I grant, we often sleep so sound, or have such faint imagery passing through the brain, that if we awake by degrees, we forget it altogether: we recollect our first waking, and perhaps some imperfect suggestions of fancy just before; but beyond this, all is mere oblivion. But I have observed that whenever I have been waked up suddenly, and not left to myself to recover from this state of mental torpor, I have been always dreaming of something, i. e. thinking, according to the tenor of the question. Let any one call you at any time, however fast asleep you may be, you make out their voice in the first surprise to be like some one's you were thinking of in your sleep. Let

an accidental noise, the falling of something in the next room, rouse you up, you constantly find something to associate it with, or translate it back into the language of your slumbering thoughts. You are never taken completely at a nonplus-summoned, as it were, out of a state of nonexistence. It is easy for any one to try the experiment upon himself; that is, to examine every time he is waked up suddenly, so that his waking and sleeping state are brought into immediate contact, whether he has not in all such cases been dreaming of something, and not fairly caught napping. For myself, I think I can speak with certainty. It would indeed be rather odd to awake out of such an absolute privation and suspense of thought as is contended for by the partisans of the contrary theory. It would be a peep into the grave, a consciousness of death, an escape from the world of non-entity!

The vividness of our impressions in dreams, of which so much has been said, seems to be rather apparent than real; or, if this mode of expression should be objected to as unwarrantable, rather physical than mental. It is a vapour, a fume, the effect of the "heat-oppressed brain." The imagination gloats over an idea, and doats at the same time. However warm or

brilliant the colouring of these changing appearances, they vanish with the dawn. They are put out by our waking thoughts, as the sun puts out a candle. It is unlucky that we sometimes remember the heroic sentiments, the profound discoveries, the witty repartees we have uttered in our sleep. The one turn to bombast, the others are mere truisms, and the last absolute nonsense. Yet we clothe them certainly with a fancied importance at the moment. This seems to be merely the effervescence of the blood or of the brain, physically acting. It is an odd thing in sleep, that we not only fancy we see different persons, and talk to them, but that we hear them make answers, and startle us with an observation or a piece of news; and though we of course put the answer into their mouths, we have no idea beforehand what it will be, and it takes us as much by surprise as it would in reality. This kind of successful ventriloquism which we practise upon ourselves may perhaps

be in some measure accounted for from the short-sightedness and incomplete consciousness which were remarked above as the peculiar characteristics of sleep.

The power of prophesying or foreseeing things in our sleep, as from a higher and more abstracted sphere of thought, need not be here argued