Book excerpt: The eight feet belong to Dervla Murphy, her nine-year-old daughter Rachel and Juana, an elegant mule, who together clambered the length of Peru, from Cajamarca near the border with Ecuador, to Cuzco, the ancient Inca capital, over 1300 miles to the south. With only the most basic necessities to sustain them and spending most of their time above 10,000 feet, their journey was marked by extreme discomfort, occasional danger and even the temporary loss of Juana over a precipice. Yet mother and daughter, a formidable duo, were unflagging in their sympathetic response to the perilous beauty and impoverished people of the Andes. In this extraordinary adventure, Dervla Murphy is at her intrepid best, facing up to the terrors, horrors and joys of her journey along the mountain paths.