She studied rocks with Elles as one of their first joint projects in the
Lake District. These studies were suggested by one of her previous professors, Marr. She continued her research alongside Elles, specifically on ancient rocks of the Welsh Borderlands as a research student at Newnham College. In 1896, she became assistant to
Charles Lapworth at
Mason College (which later became the
University of Birmingham). As Charles Lapworth's assistant during her time, Shakespear took photo's with a specialized camera, a
camera lucidia, before turning them into full illustrations of fossils. Many of these illustrations would be used in many of her papers, such as her 1901 monograph. In 1906, she earned her
DSc from the
University of Birmingham. Despite success in her field, she left her job with Lapworth in 1906 when she married Gilbert Arden Shakespear, a physics lecturer at the university whom she had met in Cambridge. However, she did remain as an associate of Newnham College for fifteen years. Despite encouragement to return to her field by her peers, she was unable due to her social work. Throughout most of her later life, Shakespear was involved with the study of
graptolite in
North Wales and around the
Welsh Borderland area. Her
monograph was to become a standard
paleontological reference work for many years.
Papers The earliest available paper published by Ethel Shakespear was a three-page section in the Cambridge Geological Magazine in 1895. With the help of Gertrude Ellas, she investigated the Drygill Shales and the fossil types found within the region in addition to the geological beds in which they were found. Their work primarily focused on the paleontological aspects of these fossils, providing insights into the ancient ecosystems and the types of organisms that existed during the time the shale was formed. In their research, Shakespear and Ellas meticulously documented various fossil specimens, analyzing their morphology and distribution. They aimed to understand the environmental conditions that led to the preservation of these fossils and what they could reveal about the Earth's history. What they found was a total of six different types fossils what were found within the shale that were uniformly distributed. The fossils found being,
Trilobita,
Ostracoda,
Branchiopoda,
Lamellibranchiata,
Gasteropoda, and
Cephalopoda. Their conclusions came to the result that from the Drygill Shale fossils, was that these fossils predate other sound at the same age within the previously investigated Lake District. The types of shale listed are, Denbighsire grits and flags, Wenlock shales, Tarannan shales, Birkhill shales, and Bala grit. With Lapworth and Elles, she published a paper in the journal
Monographs of the Palaeontographical Society on the biostratigraphy of the area from 1901 to 1914, entitled "A Monograph of British Graptolites." Shakespear was particularly responsible for the illustrations. This
monograph was to become a standard
palaeontological reference work for many years. In collaboration with her husband, Gilbert Arden Shakespear, "The Tarannon Series of Tarannon" was published in the
Geological Magazine in 1906. This was the final work published before her death. ==Other work==