 In 1886, Boas defended (with Helmholtz's support) his habilitation thesis, "Baffin Land", and was named "privatdozent" in geography.While on Baffin Island he began to develop his interest in studying non-Western cultures (resulting in his book, "The Central Eskimo", published in 1888).In 1885, Boas went to work with physical anthropologist Rudolf Virchow and ethnologist Adolf Bastian at the Royal Ethnological Museum in Berlin.