Julius LeVallon by Algernon Blackwood

The brilliance of the figure dimmed and melted, as though the shadows ate it from the edges inwards; there came a rattling at the handle of that inner chamber door; it opened suddenly; and Julius LeVallon, this time in his body of To-day, stood framed against the square of light that swirled behind him like clouds of dazzlingly white steam. The door swung to and closed. He moved forward quickly into the room.

By this time I was more in possession of my normal senses again. Here was no question of memory, vision, or imagination's glamour. Beyond any doubt or ambiguity, there stood beside me in this sitting-room of the Edinburgh lodging-house two figures of Julius LeVallon. I saw them simultaneously. There was the normal Julius walking across the carpet towards me, and there was his double that stood near me in a body of light now fading, yet unquestionably wearing the likeness of that Concerighé whom I had seen bending with the woman above the vacated body.