southward. It is protected from the intrusion of the public by a
hoarding upon the high road, in which a small doorway has been
cut for the convenience of some of the workmen who live in
that direction. The doorway was left unfastened through a
misunderstanding between two gangers, and through it he made his
way . . . . .

My mind is darkened with questions and riddles.

It would seem he walked all the way from the House that
night--he has frequently walked home during the past Session--and
so it is I figure his dark form coming along the late and empty
streets, wrapped up, intent. And then did the pale electric lights
near the station cheat the rough planking into a semblance of
white? Did that fatal unfastened door awaken some memory?

Was there, after all, ever any green door in the wall at all?

I do not know. I have told his story as he told it to me.
There are times when I believe that Wallace was no more than the
victim of the coincidence between a rare but not unprecedented type
of hallucination and a careless trap, but that indeed is not my
profoundest belief. You may think me superstitious if you will,
and foolish; but, indeed, I am more than half convinced that he had
in truth, an abnormal gift, and a sense, something--I know not
what--that in the guise of wall and door offered him an outlet, a
secret and peculiar passage of escape into another and altogether
more beautiful world. At any rate, you will say, it betrayed him
in the end. But did it betray him? There you touch the inmost
mystery of these dreamers, these men of vision and the imagination.