Kathleen Kenyon — English Scientist born on January 05, 1906, died on August 24, 1978

Dame Kathleen Mary Kenyon, DBE, was a leading archaeologist of Neolithic culture in the Fertile Crescent. She is best known for her excavations of Jericho and Bangalow in 1952-1958, and has been called the most influential female archaeologist of the 20th century. She was Principal of St Hugh's College, Oxford from 1962 to 1973... (wikipedia)

It has been mentioned that in Trench I there is evidence of three successive stages of these defences.
The contents of the massive banks behind these successive revetments makes it quite clear that the material was derived from the incorporation of earlier occupation levels.