R. G. Latham, A Handbook of the English Language
“ Apposition.—In him-self and them-selves, when accusative, the construction is that of a substantive in apposition with a pronoun. Himself = him, the individual.3. Composition.—It is only, however, when himself and themselves, are in the accusative case, that the construction is appositional. When they are used as nominatives, it must be explained on another principle. In phrases likeHe himself was presentThey themselves were present,there is neither apposition nor government ”
