At the suggestion of Peyrony, Ami excavated a trench in this area that began just above the road and continued upslope in the direction of Abri Peyrony. The size of this trench, which appears to have been quite irregular, is enormous: it is about 35 m in length and varies in width between a little over 2.5 m at the top (i.e. furthest upslope) to a maximum width of about 10 m in its central portion; it is approximately 8 m wide at its base, and with. The average thickness of the archaeological deposits is about 3 m. This represents approximately 700 m³ of deposit, most of which was excavated between 1926 and 1931.