Arguably one of the most prolific and influential anthropologists of the 20th century, Margaret Mead undertook her first field expedition in 1925 and was still publishing as late as 1975, a few years before her death. Her first field expedition to Samoa, between 1925 and 1926, resulted in a trove of materials focusing on child-rearing practice and gender roles in Samoa, as well as the widely read and critiqued ethnography, "Coming of Age in Samoa". Mead returned to the field a few years later, conducting joint research with Reo Fortune in Papua New Guinea, between 1928 and 1929, and again between 1931 and 1932. Soon after, she published "Sex and Temperament in Three Primitive Societies". The Papers contain Mead's field notebooks, draft manuscripts and other materials leading to the publication of these two seminal ethnographies.