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Chapter 22 The final fatal expedition to Peru

According to C. J. Gregory (1977), Gregory had made two unsuccessful attempts to visit parts of South America, and each time Gregory said ‘an international disaster had stopped him, so he had better not arrange a visit a third time lest some cataclysm took place’, which it did, but of a personal nature. One of his reasons for retiring early was that it freed him to depart during the austral summer, but it was not until 1932 that he was able to organize a party to explore part of Peru. The intention was to make a reconnaissance of the main Andean range and determine the age of the rocks, especially the time when they were exhumed from the Pacific, to examine the structure of parts of the Peruvian coast, the geology of the desert belt between the coast and the western front of the Andes, to visit Inca ruins and to return by one of the headwaters of the Amazon and the Amazon through Brazil to a seaport on the Amazon. However, from surviving correspondence (in the author's possession) with one of Gregory's old students, William Quarrier Kennedy (1903–1979), it is clear Gregory was also hoping to bring some samples of the Andean volcanic rocks, probably typical andesites, for Kennedy who was working on establishing the primary igneous magmas.

This was an arduous undertaking for a man of 68 years, whose last previous expedition had been nine years earlier. The high altitudes of up to 16 100 ft ( c . 4900 m) with freezing cold and the tropical heat in the jungle plus the distance to be traversed would have tried anyone, even those who were young and physically active. Gregory had visibly aged and was now bald, as shown by the last close photograph of him (Fig. 22.1 …