Fantômes.
"They don't know, as yet, quite how--but they're trying hard. They're seen only across, as it were, and beyond--in strange places and on high places, the top of towers, the roof of houses, the outside of windows, the further edge of pools; but there's a deep design, on either side, to shorten the distance and overcome the obstacle; and the success of the tempters is only a question of time. They've only to keep to their suggestions of danger." (The Turn of the screw – James)