Well, yes, Bill, you are correct and IP is somewhat correct. I've never heard of a residual dative, although it's obvious what he means. There is no dative case in modern English. I would call this construction an indirect object, which my old English grammar teachers did learn us about back in the Middle Ages (1950's).

The most common usage of this is in a construction like, "Give me the book" where 'me' is an indirect object and 'book' is a direct object. (In German or Anglo Saxon, Latin, Greek or other declined languages, 'me' would be in the dative and 'book' in the accusative case.)