 So Ruatapu gathered the bark of an au tree and treated it with "kiriau" - a process of leaving it in the sea for a few days before bringing it to land, to keep it from rotting for about a year.He called the people of Vaitupa to help make the nets, as they had never had nets on the island before.Together they completed a small net called a "tuturua", which Ruatapu gave to his son Te Urutupui.