Charles Robert Darwin (1809-1882) was a distinguished scientist whose Origin of Species first clearly formulated and elaborated the theory of evolution. His first work (1897) described a five year cruise in the Beagle which the British Government had sent out for scientific purposes. His Origin of Species appeared in 1859 and though supported by the scientific thought of the time, was much attacked by theologians. In 1871 Darwin issued his Descent of Man, a still further elaboration of the evolution theory. His other principal works were The Expression of Emotion in Man and Animals (1872), Insectivorous Plants (1875), Different Forms of Flowers (1877) and Worms (1881). He was buried in Westminister Abbey.