<P> In the early Victorian period , two young cousins , Richard ( Glenn Kohan ) and Emmeline Lestrange ( Elva Josephson ) , and a galley cook , Paddy Button ( Leo McKern ) , survive a shipwreck in the South Pacific and reach a lush tropical island . Paddy cares for the children and forbids them by `` law '' from going to the other side of the island , as he had found remains from bloody human sacrifices on an altar . He also warns them against eating a deadly scarlet berry . </P>
what was on the other side of the island in blue lagoon
remains from bloody human sacrifices on an altar