Why did Victor travel for several months after Elizabeth's murder?

Upon his release, all Victor is obsessed by thoughts of taking revenge upon his creature. He visits a magistrate to ask for the help of the law in apprehending the creature. Though the official listens attentively, it is clear that he only half-believes Frankenstein's wild tale. He tells Victor, quite reasonably, that it would be nearly impossible to pursue a superhuman being of the kind he has described. Frankenstein is enraged, and vows that he will devote himself to the creature's destruction. He recognizes his lust for vengeance as a vice but says that, in his current state of wretchedness, it is "the devouring and only passion of his soul."