THE MOST ANCIENT REMAINS OF MAN 
been discovered before. The crevice passed here obliquely 
across part of the incline and, as in the portion seen earlier, 
was filled with detritus, bones of bats or rodents, ore, and 
more or less mineralized bones of larger animals. The 
extent and contents of this cave or crevice were only 
learned gradually in the course of the prolonged work 
of mining. 
After the inclined plane reached the bottom of the cen- 
tral excavation, some of the workmen were directed to 
turn back and work on the ore and stone exposed by the 
plane; and it was in these parts, not long after, at a level of 
approximately sixty feet below the surface, that a Swiss 
miner, Mr. T. Zwigelaar, working with his black “boy”’ in 
some softer fillings, was confronted, after a stroke of the 
boy’s pick, with the Rhodesian skull (Plate 50). 
As good fortune would have it, before the writer’s de- 
parture from Broken Hill he was able to locate and inter- 
view five of the men concerned from the beginning in the 
discovery, including Mr. Zwigelaar, who actually found the 
skull; and a sixth one was reached later by a letter. Each 
of these men was most willing to tell all he knew, but their 
memories regrettably were no longer clear as to the par- 
ticulars. However, what was obtained is not without 
importance. At the British Museum the writer was very 
kindly furnished with copies of all the official entries 
relating to the find and to an earlier collection from the 
same cave. 
As the collective sifted result of the information ob- 
tained from all quarters, as the result of the personal in- 
spection of the mine and of what remains of the bone 
cave, and with the impressions left by the different men 
associated with the finds, the conclusion is that the real 
conditions had probably been somewhat as follows: 
The ‘‘bone cave” was an extensive irregular crevice 
running for 120-150 feet inward and downward from near 
the base of the hill and reaching the maximum depth 
below the surface of about 70 feet. 
Las? 
