<P> The highest peaks on the island of New Guinea are: </P> <Ul> <Li> Puncak Jaya, sometimes known by its former Dutch name Carstensz Pyramid, is a mist - covered limestone mountain peak on the Indonesian side of the border . At 4,884 metres (16,024 ft), Puncak Jaya makes New Guinea the world's fourth - highest landmass . </Li> <Li> Puncak Mandala, also located in Papua, is the second - highest peak on the island at 4,760 metres (15,617 ft). </Li> <Li> Puncak Trikora, also in Papua, is 4,750 metres (15,584 ft). </Li> <Li> Mount Wilhelm is the highest peak on the PNG side of the border at 4,509 metres (14,793 ft). Its granite peak is the highest point of the Bismarck Range . </Li> <Li> Mount Giluwe 4,368 metres (14,331 ft) is the second - highest summit in PNG . It is also the highest volcanic peak in Oceania . </Li> </Ul> <Li> Puncak Jaya, sometimes known by its former Dutch name Carstensz Pyramid, is a mist - covered limestone mountain peak on the Indonesian side of the border . At 4,884 metres (16,024 ft), Puncak Jaya makes New Guinea the world's fourth - highest landmass . </Li> <Li> Puncak Mandala, also located in Papua, is the second - highest peak on the island at 4,760 metres (15,617 ft). </Li>

The main reason for british claiming the western half of new guinea was for