The process accelerated in the 20th century. Lilly Newton (née Batten) (1893–1981) Professor in Botany at the University College of Wales, Aberystwyth and Professor Emeritus in 1931 wrote: A Handbook of the British Seaweeds.[40] This was the first, and for quite a time, the only book for identification of seaweeds in the British Isles using a botanical key. In 1962 Eifion Jones published: A key to the genera of the British seaweeds.[41] This small booklet provided a valuable source in the period before the valuable series Seaweeds of the British Isles was produced by the British Museum (Natural History) or The Natural History Museum.