Wolf in a Cage and The Gift: Two Fantasies

In the wilderness of Alaska a man escapes the attack of a pack led by a savage black wolf.  Many years later, in the ruins of Jack London's Wolf House a wanderer discovers the trapped spirit of a wolf pacing back and forth.  But who or what is it, and is it benign or malevolent?  And...  A musician busking in the Athens subway system encounters another musician who can play the souls of men.