In 1874, Duhamel founded the Isère or Grenoble section of the Club alpin français (French Alpine Club) and began to explore the peaks of Dauphiné [REF].
When French mountain climber Henri Cordier was killed in an accident on the slopes of Le Plaret in June 1877, Duhamel took charge of returning Cordier's body to La Bérarde, where he photographed it [REF].