rs, or twenty years,
but, even if it did, the game was still worth the candle. Suppose one
to have at last just hit the right trick, before the secret got out
and diamonds became as common as coal, one might realise millions.
Millions!"

He paused and looked for my sympathy. His eyes shone hungrily. "To
think," said he, "that I am on the verge of it all, and here!

"I had," he proceeded, "about a thousand pounds when I was twenty-one,
and this, I thought, eked out by a little teaching, would keep my
researches going. A year or two was spent in study, at Berlin chiefly,
and then I continued on my own account. The trouble was the secrecy.
You see, if once I had let out what I was doing, other men might have
been spurred on by my belief in the practicability of the idea; and I
do not pretend to be such a genius as to have been sure of coming in
first, in the case of a race for the discovery. And you see it was
important that if I really meant to make a pile, people should not
know it was an artificial process and capable of turning out diamonds
by the ton. So I had to work all alone. At first I had a little
laboratory, but as my resources began to run out I had to conduct my
experiments in a wretched unfurnished room in Kentish Town, where I
slept at last on a straw mattress on the floor among all my apparatus.
The money simply flowed away. I grudged myself everything except
scientific appliances. I tried to keep things going by a little
teaching, but I am not a very good teacher, and I have no university
degree, nor very much education except in chemistry, and I found I had
to give a lot of time and labour for precious little money. But I got
nearer and nearer the thing. Three years ago I settled the problem of
the composition of the flux, and got near the pressure by putting
this flux of mine and a certain carbon composition into a closed-up
gun-barrel, filling up with water, sealing tightly, and heating."

He paused.

"Rather risky," said I.

"Yes. It burst, and smashed all my windows and a lot of my apparatus;
but I got a kind of diamond powder nevertheless. Following out the
problem of getting a big pressure upon the molten mixture from
which the things were to crystallise, I hit upon some researches of
Daubree's at the Paris _Laboratorie des Poudres et Salpetres_. He
exploded dynamite in a tightly screwed steel cylinder, too strong to
burst, and I found he could crush rocks into a muck not unlike the
South Afr