Two hundred years ago James Cook, a Royal Naval Lieutenant from Great Britain, set foot in Botany Bay to be greeted with spears and antagonism from the inhabitants of the new Australia - the aborigines. Today, decimated by murder, rape, brutality, and white man's diseases, the aborigines are far fewer in number than the contented nomadic tribes which originally roamed the island continent they called their own. Earlier this year, when the Queen witnessed a folksy re-enactment of Cook's first landing in Botany Bay, the black militants among Australia's aborigines simultaneously performed their own ceremony on the opposite shore. They threw wreaths into the ocean to mark the death of their tribes and to draw attention to the difficulties in the way of their hopes and ambitions to become as Australian as the descendants of the convicts and the settlers from a score of other countries. Jeremy James and a Man Alive team discovered in Australia concern as well as apathy; a problem for a gove