Illustrations of mind-work occur continually in literature. A recent instance is in the new tragedy by Edgar Fawcett, called The Earl. The hero has allowed his taunting brother to perish in a cave, from which he might have rescued him. Ever after he hears his dead brother's voice cry Help,—so plainly that he wonders others do not hear the sound; yet this sound is wholly in the Earl's own mind; as the jingle of bells, in the famous French play, by Erckmann-Chatrian, is heard only by the innkeeper, Matthias, who has assassinated the Polish Jew in his sleigh. The sounds within the mind are as real as those heard from outside.