In which a small but diverse party, including an English lord, a jovial geographer, and a youthful companion, embark upon the arduous crossing of the Chilean Andes, adopting local customs and relying on hardy Argentine mules to traverse a wild and sparsely populated land. Along the way, the travellers encounter the challenges and peculiarities of the terrain and its inhabitants, while their keen observations and ardent spirits sustain them on this remarkable journey.