In 1811, the brothers Johann Rudolf (1768–1825) and Hieronymus Meyer, sons of Johann Rudolf Meyer (1739–1813), the head of a rich merchant family of Aarau, along with several servants and a porter picked up at Guttannen, first reached the Valais by way of the Grimsel, and crossed the Beich Pass, a glacier pass over the Oberaletsch Glacier, to the head of the Lötschen valley. There, they added two local chamois hunters, Alois Volken and Joseph Bortis, to their party and traversed the Lötschenlücke before reaching the Aletschfirn (the west branch of the Aletsch Glacier), where they established the base camp, north of the Aletschhorn. After the Guttannen porter was sent back alone over the Lötschenlücke, the party finally reached the summit of the Jungfrau by the Rottalsattel on August 3. They then recrossed the two passes named to their point of departure in Valais, and went home again over the Grimsel.