[Frontispiece: A strange apparition was seen crossing the lake. It appeared to have wings, but it did not fly; and though it possessed a tail, it did not run, but contented itself with moving steadily forward on its long up-turned feet. Over an arm it carried what might have been a trident, and what with its waving tail and great outspreading wings that rose above its horned-like head, it suggested … See Chapter VI.]