Karl Sabbagh tells the unhappy story of Professor J.W. Heslop Harrison FRS and his lapses from the professional standards of behaviour expected of a scientist. He came from humble beginnings, the son of an iron worker, and grew up in harsh conditions in the early part of the twentieth century. By dint of hard work he went to university and eventually became an academic botanist, specializing in the study of plant classification and distribution. In the 1930s when Heslop Harrison began his professional career, the Hebridean islands off the Scottish coast were largely unexplored. When he and others made scientific surveys on the islands, they discovered they had unique species and subspecies of plant and insect, some of which were new to science. These discoveries made Heslop Harrison's reputation. His richest site was the island of Rum, previously in private hands and not botanically examined at all.

At first, his discoveries attracted no suspicion. But by the end of the 1930s some of his claims were becoming bizarre. He was using them to support a hypothesis that the islands had escaped the last Ice Age which had buried the Scottish mainland under a massive sheet of ice. The final straw for a Cambridge colleague, John Raven (a classicist and amateur naturalist), came in 1941 when Heslop Harrison published two papers announcing the discovery on Rum of species previously unknown in Great Britain. After the war, Raven managed to join one of Heslop Harrison's expeditions to the island and see these wonders for himself. […]