With the arrival of Europeans in the 17th century, and European colonization in the late 19th century, many elements of Fijian culture were either repressed or modified to ensure European – specifically, British – control. This was especially the case with respect to traditional Fijian spiritual beliefs. Early colonists and missionaries pointed to the practice of cannibalism in Fiji as providing a moral imperative justifying colonization. Europeans labelled many native Fijian customs as debased or primitive, enabling many colonists to see Fiji as a "paradise wasted on savage cannibals". Stories of cannibalism were circulated during the 19th century, such as one about Ratu Udre Udre, who was said to have consumed 872 people and to have made a pile of stones to record his achievement. Stories like that made it easier for Europeans to stereotype and denigrate Fijians as "uncivilised". Authors such as Deryck Scarr have perpetuated 19th century claims of "freshly killed corpses piled up for eating" and ceremonial mass human sacrifice on the construction of new houses and boats. In fact, during colonial times, Fiji was known as ''the Cannibal Isles''. On the other hand, William MacGregor, the long-term chief medical officer in British colonial Fiji, wrote that tasting of the flesh of the enemy was done only on rare occasions, and only "to indicate supreme hatred and not out of relish for a gastronomic treat".