"The great majority of British naturalists of the eighteenth and nineteenth centuries in fact considered foreign organisms much more exciting and interesting than those found at home. This is not to say that local natural history suffered: David Allen's important book describing the Naturalist in Britain indicates the wealth of popular interest in animals and plants and the depth of knowledge relating to British organisms ... Yet the inexhaustible lure of travel and the anticipated pleasures of foreign lands, both mental, moral, and physical, were important components in the history of this subject. Excitement, change, and the thrill of difference were integral emotional factors in the growth of British interest in biogeographical topics—indeed crucial as the relaxed aura of eighteenth-century social life metamorphosed into a strait-laced Victorian era. Nevertheless, a love for natural history and a desire to travel were in no way sufficient reasons to account for the increase of overseas activitiy among naturalists. Far more significant was the hierarchical structure of British society and expansionist national ethos."