Ten delegates , among them Louis Haefliger ( Camp Mauthausen ) , Paul Dunant ( Camp Theresienstadt ) and Victor Maurer ( Camp Dachau ) , visited the camps . Ten delegates , among them Louis Haefliger ( Mauthausen Camp ) , Paul Dunant ( Theresienstadt Camp ) and Victor Maurer ( Dachau Camp ) , accepted the assignment and visited the camps .