"I don't know," said Mary, shuddering, "but just now I am certain I saw a form appear, and then suddenly vanish upon that shelf of rock."
"Are you sure?"
"Yes."
Turk looked solemn; Brand turned deadly pale.
"It must have been a spirit," said the old tar; "some imp after you, Cap," he added, looking straight at Brand.
"Ay, a spirit," muttered the captain, his teeth chattering.