I dreamed of it all night, and my imagination ran upon it all day: it was uppermost in all my thoughts, and my fancy worked so steadily and strongly upon it that I talked of it in my sleep; in short, nothing could remove it out of my mind: it even broke so violently into all my discourses that it made my conversation tiresome, for I could talk of nothing else; all my discourse ran into it, even to impertinence; and I saw it myself.
I have often heard persons of good judgment say that all the stir that people make in the world about ghosts and apparitions is owing to the strength of imagination, and the powerful operation of fancy in their minds; that there is no such thing as a spirit appearing, or a ghost walking; that people's poring affectionately upon the past conversation of their deceased friends so realises it to them that they are capable of fancying, upon some extraordinary circumstances, that they see them, talk to them, and are answered by them, when, in truth, there is nothing but shadow and vapour in the thing, and they really know nothing of the matter.
For my part, I know not to this hour whether there are any such things as real apparitions, spectres, or walking of people after they are dead; or whether there is anything in the stories they tell us of that kind more than the product of vapours, sick minds, and wandering fancies: but this I know, that my imagination worked up to such a height, and brought me into such excess of vapours, or what else I may call it, that I actually supposed myself often upon the spot, at my old castle, behind the trees; saw my old Spaniard, Friday's father, and the reprobate sailors I left upon the island; nay, I fancied I talked with them, and looked at them steadily, though I was broad awake, as at persons just before me; and this I did till I often frightened myself with the images my fancy represented to me.

One time, in my sleep, I had the villainy of the three pirate sailors so lively related to me by the first Spaniard, and Friday's father, that it was surprising: they told me how they barbarously attempted to murder all the Spaniards, and that they set fire to the provisions they had laid up, on purpose to distress and starve them; things that I had never heard of, and that, indeed, were never all of them true in fact: but it was so warm in my imagination, and so realised to me, that, to the hour I saw them, I could not be persuaded but that it was or would be true; also how I resented it, when the Spaniard complained to me; and how I brought them to justice, tried them, and ordered them all three to be hanged.

What there was really in this shall be seen in its place; for however I came to form such things in my dream, and what secret converse of spirits injected it, yet there was, I say, much of it true.

I own that this dream had nothing in it literally and specifically true; but the general part was so true--the base; villainous behaviour of these three hardened rogues was such, and had been so much worse than all I can describe, that the dream had too much similitude of the fact; and as I would afterwards have punished them severely, so, if I had hanged them all, I had been much in the right, and even should have been justified both by the laws of God and man.
But to return to my story.

In this kind of temper I lived some years; I had no enjoyment of my life, no pleasant hours, no agreeable diversion but what had something or other of this in it; so that my wife, who saw my mind wholly bent upon it, told me very seriously one night that she believed there was some secret, powerful impulse of Providence upon me, which had determined me to go thither again; and that she found nothing hindered me going but my being engaged to a wife and children.