If one chanced to be within certain prescribed and very rare conditions, the slat of one of the shutters opened opposite you; the evoked spirit became an apparition. Behind the grating, behind the shutter, one perceived so far as the grating permitted sight, a head, of which only the mouth and the chin were visible; the rest was covered with a black veil. One caught a glimpse of a black guimpe, and a form that was barely defined, covered with a black shroud. That head spoke with you, but did not look at you and never smiled at you.
The light which came from behind you was adjusted in such a manner that you saw her in the white, and she saw you in the black. This light was symbolical.
Nevertheless, your eyes plunged eagerly through that opening which was made in that place shut off from all glances. A profound vagueness enveloped that form clad in mourning. Your eyes searched that vagueness, and sought to make out the surroundings of the apparition. At the expiration of a very short time you discovered that you could see nothing. What you beheld was night, emptiness, shadows, a wintry mist mingled with a vapor from the tomb, a sort of terrible peace, a silence from which you could gather nothing, not even sighs, a gloom in which you could distinguish nothing, not even phantoms.
What you beheld was the interior of a cloister.
It was the interior of that severe and gloomy edifice which was called the Convent of the Bernardines of the Perpetual Adoration. The box in which you stood was the parlor. The first voice which had addressed you was that of the portress who always sat motionless and silent, on the other side of the wall, near the square opening, screened by the iron grating and the plate with its thousand holes, as by a double visor. The obscurity which bathed the grated box arose from the fact that the parlor, which had a window on the side of the world, had none on the side of the convent. Profane eyes must see nothing of that sacred place.