LIVERPOOL.- Its just a tiny trunk but for orphaned William Kelly, 15, it contained his whole world: some clothes, boots, handkerchiefs, needle, thread and a bible. In 1925 William was sent from Liverpool aboard SS Athenia to a new life in Canada. The trunk was typical of those given to child migrants who left their homes, families and friends forever. Liverpool is linking up with Australia to tell the emotional story of child and youth migration. And the small trunk belonging to William has now gone on show at Merseyside Maritime Museum. From 1860 until the 1960s migration schemes saw youngsters and teenagers separated from families and sent to the ends of the earth to begin new lives. Many were orphaned or had come from poor families who could no longer look after them and it was felt Australia and Canada provided better opportunities and a standard of life. Children sailed from Liverpool, Glasgow, London and Southampton. While many found happiness, others suffered abuse