The intrusive culture, as represented by its pottery, has in origin nothing to do with the Harappa culture; its ceramic differs from that of the latter both in finish and in decoration, and its dwellings . . . arc notably more roughly constructed than those of Harappa proper. Its analogues have not yet been identified, and it appears in fact as abruptly as did its Harappan predecessor. The suggestion has been made [by Childe] very hesitatingly, that the Cemetery H intruders "may belong to the Aryan invaders.