It was excavated in the late 1920s, and then again in 1965 by
Hilary and
Janette Deacon. and shell artifacts are found in the deposits elsewhere of the Howiesons Poort period. Stone tools similar to those in the cave have been collected from hillsides above the rock shelter. Originally, and until the mid-1970s, the remains at Howiesons Poort Shelter were thought to belong to the
Magosian period and so intermediate in time and technology between the Middle Stone Age and
Late Stone Age. However,
optically stimulated luminescence dating pushed back dates for occupation by this period to 65,800 BP and 59,500 BP. Apart from the Howiesons Poort period, Deacon proposed that the cave may have been occupied more recently for several very short periods (ca. 18-19000 BP, ca. 9-10000 BP and ca. 3-4000 BP) by people who made fires but left few or no artefacts. However, this explanation is presented only as one of a number of possible scenarios. ==See also==