“Well,” continued Kate, “it is difficult to realise that this monster pit has been hewn out in so short a time by man. Nothing daunts him in his frantic search for wealth.”

“Those white men you see are overseers. Each overseer has from ten to fifteen Kafirs under his eye, to see that they do not conceal diamonds, as they turn over the ‘blue stuff’ as we call it,” said Schwatka. “Notwithstanding the utmost watchfulness, they contrive to steal and secrete the gems about their persons in inconceivable ways. As an incentive to his vigilance each overseer is given a portion of the profits on all diamonds found under his watchful eyes. An overseer picked up the Porter Rhodes diamond, and his share of the profits made him a wealthy man.”

“Do these overseers detect many Kafirs in the act of stealing?”

“No, Miss Darcy. A Kafir’s countenance is so immovable, that it is unreadable. Looking right at the overseer he will work a diamond in between his toes, and thus convey it out of the mine. He eludes the keenest vigilance by concealing the gems in his woolly hair, and under his tongue, and even by swallowing them. A stray dog will receive into his shaggy back, a valuable stone, and carry it around with him, until relieved of it by the Kafir.”

“The working of the mine must be attended with great expense, and these natives must seem like vampires to the claim-holders,” said Kate.

“That is true. Two years ago there were one million carats of diamonds taken out of the Kimberley Mine, while those of Dutoits Pan and Bultfontein yielded no less than seven hundred thousand carats. About one quarter of this enormous product was stolen by the Kafirs employed in the mines, and sold by them to the I.D.B.’s, who are often respected and licensed diamond buyers. The large number of jewels stolen by the blacks while working in the mines has led the Government to make stringent laws to regulate their purchase and sale.”

“How do these Kafirs know to whom to sell their booty?” asked Kate.

“Most of the natives who work in the mines have friends in service in the town; and it is through their assistance that they dispose of the stolen diamonds. These house servants form the acquaintance of some illicit diamond buyer, or I.D.B., as he is pithily called, to whom they sell the precious stones. There is a fascination to some men engaged in this traffic which far excels that of any other species of gambling. If they win, they leave for Europe comparatively rich men in a few years, but they run such risks of detection that it makes life unbearable to a man troubled with a conscience.”

“Are the diamonds from this soil as fine as those taken from the Brazilian mines?”