[2] In 1935, Eccles assisted the archaeologist Spyridon Marinatos with excavations at the cave sanctuary of Arkalochori.
[2] She maintained a strong professional relationship with Marinatos throughout her life, which is documented through letters published in 2015.
[1] In 1936, Eccles attended Bryn Mawr College as the Mary Paul Collins Fellow in Archaeology.
At that time, she worked on illustrations for Arthur Evans's publication of their excavations at Knossos.
[4] Eccles studied Greek Archaeology under Mary Hamilton Swindler,[2] whilst researching gems and seal stones of the Late Minoan and Mycenean periods.