its about a journy,which relates to a boyhood friend. The Wanderer went in an advanture.
http://wiki.answers.com/Q/What_is_the_theme_of_the_wanderer_poem"
There is a narrator and then there is the wanderer.
i don't know read it for yourself it may interesting?!:)
adventure (a wild and exciting undertaking (not necessarily lawful)) and family (a group of people related by blood or legal partnerships such as marriage or adoption)