Gas chromatography of two samples from the piece
identifies the main constituent as beeswax, with the addition of a
protein-based material (possibly egg), and triterpenoids derived
from Euphorbia tirucalli resin. 

Resins can be exploited as adhesives, but triterpenoids
are also used in high concentrations as poisons and in lower
concentrations medicinally. Euphorbia ingens (naboom or giant
euphorbia) and E. tirucalli (rubber-hedge euphorbia or Manyara),
widely distributed in Africa, have particularly poisonous latex and
seeds. Although very poisonous and used as an insecticide or to kill
fish, E. ingens is also used medicinally, but it can be fatal.

excerpts from:

Early evidence of San material culture represented by
organic artifacts from Border Cave, South Africa 

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