In the Bernina Range in Italy and Switzerland, Tuckett and E. N. Buxton made the first crossing of the Fuorcla dal Zupò, the fairly difficult pass between Piz Zupò and Piz Argient, together with guides Peter Jenny, Christian Michel and Franz Biner on 28 July 1864; on the same day, with the same party, he made the first crossing of the Fuorcla Crast' Agüzza. In the same range Tuckett and F. A. Y. Brown made the first ascent of the south ridge (or Spallagrat) of Piz Bernina together with guides Christian Almer and Franz Andermatten on 23 June 1866. This is today the normal route up the mountain.