The stories in this book are of revenants: persons who either in spirit or in body revisit old scenes, return upon old selves or old emotions, or relate a message from a world beyond perception. "Which?" was suggested by a passage in Hawthorne's Note-books, where he proposes a story or sketch the scene of which is "to be laid within the light of a street lantern; the time, when the lamp is near going out; and the catastrophe to be simultaneous with the last flickering gleam." "The Lady of the Ship" is very nearly historical. "Prisoners of War" rests on the actual adventures of two St. Ives men, Thomas Williams and John Short, in the years 1804-1814. "Frozen Margit" and "The Seventh Man" have--if not their originals--at least their suggestions in fact.