What did Jacob Black tell bela about the Cullens at first beach?

relating an old legend of his people, Jacob subtly revealed that his people not only believe in werewolves but believe they are descended from them (and as we learn in New Moon, some of their people still carry the trait and become werewolves during puberty). He also tells Bella that the sworn enemy of the wolves is 'the Cold Ones' (aka Vamps who have ice cold skin) and that the Cullens have a treaty with the tribe not to enter their land. And that this treaty is decades old and was agreed to by the same Cullens living in Forks at that very moment.