He made more than a dozen first ascents, including: • 1877: First ascent of the
Aiguille Noire de Peuterey with Lord Wentworth (the grandson of
Lord Byron) and Jean-Baptiste Bich on 5 August. • 1879: First ascent of the Aiguille de Talèfre (3,730 m) with Johan Baumann, F. J. Cullinan, G. Fitzgerald, Joseph Moser and Laurent Lanier on 25 August. • 1882: First ascent of the Calotte de Rochefort, the main summit of
Les Périades, with C. D. Cunningham. • 1888: First winter traverse of Mont Blanc from the Italian side, with Alessandro, Corradino, Erminio and
Vittorio Sella, Joseph Jean-Baptiste and Daniele Maquignaz and Giuseppe Maquignaz and two porters. They went from the Aiguilles Grises, cutting many steps in the Bosses Ridge to reach the summit, and then descended to the Grand Mulets, on 5 January. It was later described as a "very remarkable and daring enterprise". • 1888: New route to Mont Blanc by the
Aiguille de Bionnassay east ridge with
Katharine Richardson and Jean-Baptiste Bich on 13 August. • 1893: First ascent of Mont Blanc by the
Aiguille Blanche and the Peuterey Ridge with
Paul Güssfeldt,
Christian Klucker and Cesar Ollier. Four-day climb from 14 to 17 August. • The third, fourth, and fifth ascents of the higher peak of the Dru over four consecutive days. One of these ascents, with W.E. Davidson, was made direct from Montenvert without an overnight stop beforehand. It was also made totally unaided by fixed ropes or ladders, a feat that impressed the first ascensionist,
C. T. Dent, who had spent innumerable hours on the route. • 1877: First traverse of the Grands Charmoz. • Gran Paradiso from the glacier of the Tribulation. •
Dent d'Hérens to the crest Tiefenmatten. ==Travels abroad==