Among mountain guides, the eastern wall had the reputation of being unconquerable. Ferdinand Imseng was convinced that the long snow couloir in the middle of the face could be ascended. He succeeded in convincing other climbers and, on 22 July 1872, Richard Pendlebury, William and Charles Taylor, Ferdinand Imseng, Gabriel Spechtenhauser and Giovanni Oberto began the ascent from Macugnaga. They were aware of the objective dangers of the wall but they decided to go as high as possible, without compromising their lives. After a bivouac on the actual Marinelli hut emplacement, they headed towards the Grenzsattel. Suddenly, when they arrived near the Grenzsattel, an avalanche started and rivers of snow began to flow everywhere around the climbers. They were able to reach the safe rocks of the Grenzgipfel just in time to save their lives. They finally reached the summit and descended to Riffelalp on the other side, concluding an 18-hour journey.