That their aid may be employed to benign or malignant purposes, cannot be disproved.
Darkness rests upon the designs of this man.

The extent of his power is unknown; but is there not evidence that it has been now exerted?
I recurred to my own experience.

Here Carwin had actually appeared upon the stage; but this was in a human character.

A voice and a form were discovered; but one was apparently exerted, and the other disclosed, not to befriend, but to counteract Carwin's designs.

There were tokens of hostility, and not of alliance, between them.