He then turned his attention to the Aiguille du Dru (3,754 m), a steep granite peak in the Mont Blanc massif that had been ignored by the early generation of alpinists whose ambitions had been focused more on the higher mountains. After eighteen failed attempts with a number of different guides and companions (during which he used ladders to overcome difficulties), Dent at last made the first ascent of the Grande Aiguille du Dru (the higher of the mountain's two summits) on 12 September 1878, with James Walker Hartley and the guides Alexander Burgener and Kaspar Maurer. He wrote of the Dru: