Where Wolf

Why didn't Remus Lupin come save Harry from the Dursleys, or at least come to visit? It's been mentioned in passing that he went 'to the continent' for work after 1981. He arrives at Hogwarts in 1993, and teaches Defence Against the Dark Arts. With a battered suitcase. Warnings: Police brutality, scritches and a confused Englishman. Oh, and lycanthropy, but that's a given.