A few months ago the British Film Institute released archive film of the early motor expeditions of Ralph Bagnold and his crew, exploring deep into the Libyan Desert. (Click BFI if youtube below gets deleted). The map top right shows all his expedition in the 1930s.
The film is 49 minutes long and describes the first recce in 1929 into the Great Sand Sea of the Western Desert via Ain Dalla spring. It was here that Bagnold’s group found lowering tyre pressures, as well as using sand plates and rope ladders, enabled heavy vehicles to traverse dunes.
A year later they set off towards Jebel Uweinat, a massif located by Ahmed Hassanein Bey less than a decade earlier during a camel trek from Jalo in Libya. At Ain Dalla camels brought in extra fuel, and the cars continued to Jebel Kissu south of Uweinat, then east for the Nile via Selima oasis.