From the source:
"However, and earlier presence was indicated
at Abu Rowash evidenced by objects bearing the names of
the 1st Dynasty pharoahs, Aha and Den, which were found near the
pyramid. Hence, in connection with those excavations, Pierre Montet was asked
to explore two sections of the huge Thinite necropolis and one dating to the 4th Dynasty,
located to the southeast of the village of Abu Rowash."
A ramp. Take a look everyone. A Ramp!
All the best,