Evidence for light architecture characteristic of mobile and semi-mobile societies is difficult to detect archaeologically. This article investigates such evidence in the form of narrow cylindrical holes discovered on rock walls at the archaeological site of Sphinx, in the Sixth Nile Cataract (central Sudan). Using innovative experimental reconstruction, these holes are interpreted as features associated with wooden pole-built structures, some of which may have been dwellings. This research highlights a significant category of North African archaeological evidence which has, to date, received limited attention.