In the 19th century, Charles Hose (an administrator in the Raj of Sarawak), attempted to climb Mount Mulu but failed. It was only in the 1920s, when a Berawan rhino hunter named Tama Nilong discovered the south-west ridge near the mountain which eventually led to the summit. In 1932, Tama Nilong led Edward Shackleton during an Oxford University Expedition to the summit of Mount Mulu. This is the first successful ascend to the summit of Mount Mulu. In 1961, G.E. Wilford, of the British Borneo Geological Survey visited Mulu caves. He surveyed the Deer Cave and Cave of the Winds. He also predicted that more caves will be discovered in the future.