Her work on the genera of graptolites from North Wales and the Skiddaw Slates of the Lake District, England and from the Wenlock Shales of the Welsh borders eventually led to Elles' receiving the Lyell Fund of the Geological Society of London in 1900, but was unable to collect it since women were barred from meetings. In 1919 she became one of the first female Fellows of the Geological Society, and in the same year won its Murchison Medal.