First edition published by the Transvaal Museum & printed by Voortrekkerpers in 1950.

This copy is ex-library with the usual ink stamps and loan cards. The content is in neat condition.

117pp, illustrated.

In two parts:

1.) Further Evidence of the Structure of the Sterkfontein Ape-Man Plesianthropus - by Robert Broom & J. T. Robinson.

2.) The Brain Casts of the Recently Discovered Plesianthropus Skulls - by G.W.H. Scheepers.

Robert Broom and J. T. Robinson made a series of spectacular finds in and around the Sterkfontein caves. This region north-west of Johannesburg is known today as The Cradle of Humankind World Heritage Site because of its importance as a site for the study of early homonin fossils. Their finds in the cave included fragments from six homonins which they called Pleisianthropus Transvaalensis, popularly known as Mrs. Ples.

At Swartkrans in 1948 Broom made his most famous discovery, that of a fossilized homonin skull with a robust appearance. It had a bulging and continuous brow, a broad flat face and deep jaw with large chewing teeth. This early homonin was estimated to be about 1.8 million years old. He named the genus Paranthopus robustus.

Before his discoveries that would make him world-famous he worked as a professor of geology and paleontology at the University of Stellenbosch, but was later forced out of this position for promoting the belief in evolution.