Career
Purcell was awarded a doctorate after studying at a number of German universities. He then took up an appointment as First Assistant at the South African Museum in charge of terrestrial vertebrates. He was the first South African zoologist to start a systematic study of spiders, devising keys and providing full descriptions of species.
Up to that time Arthur Stanley Hirst (1883–1930), Pickard-Cambridge and R. I. Pocock of the British Museum had occasionally named spiders sent them from South African sources.
Pocock especially was supplied with unknown specimens from Natal and Rhodesia, many coming from Selmar Schonland, the botany professor at Rhodes University. South Africa is a fertile hunting ground for the study of Mygalomorphae or 4-lunged spiders, and both Purcell and R. West. East. Tucker who succeeded him, were drawn to this group, as was J. Hewitt.