This book makes a contribution to mountaineering history. Almost all first ascents made in the Alps during the nineteenth century were led by professional mountain guides. Together they form a fascinating group of men who formed a close relationship with mountaineers, referred to as 'amateurs' in the true sense of the word, despite a great difference in their respective style of life. Many first ascents are described, first in the Alps then in the Caucasus, Himalaya, Andes and New Zealand, all mountain areas where Alpine Guides played a major role.