http://b4hntuy3fimfh2227vf4f74emnya7p35i5brtqujs6leqvtclfwvjbqd.onion/doc/physics/diamonds-crookes/The%20Project%20Gutenberg%20eBook%20of%20Diamonds,%20by%20William%20Crookes..html
He willingly consented,
but no diamonds were to be found. On my
expressing regret, he said he had not seen a
diamond for a fortnight! I remarked that
the prospect was rather a poor one, but he
told me that a fortnight before he picked
out one worth £300, “and that,” he said,
“will pay for several weeks’ wages of my
boys.”