“The moulds,” I thought to myself, and I looked eagerly now at one of the men, who shouted something by way of warning to his fellow-worker; and then, as the man stepped behind a similar screen of wood-work to that which sheltered me, the one who uttered his words of warning thrust and hammered with his long iron rod at the foot of the furnace.
I did not quite see what he did afterwards, but he seemed to dart out of the way, and then a stream of what looked like liquid gold came gushing out, sputtering, snapping, and sending into the air myriads of glorious firework-like sparks of blue and orange and scarlet and gold, and so brilliant that they lit up the whole building and made my eyes ache and my cheeks tingle. Where a minute before there were so many black trenches were now so many dazzling ingots, over which played and fluttered many-tinted flames that kept on waving and undulating as if they were liquid, and swayed from side to side, giving forth with the molten metal a glow that scorched my face.
For the first few seconds the molten metal had run off quickly and filled the moulds; now what came was sluggish and not half so brilliant; and I noticed that by a quick movement of a long iron rake one of the men drew some of the earth and charcoal which formed the floor on one side, so as to alter the course of the running molten contents of the furnace, and instead of its passing into moulds it seemed to settle down in a patch.
This, too, was most brilliant to the eye; and from it endless dazzling coruscations darted up and played about, but for a much shorter period; and in place of the ruddy glow of the metal, which rapidly cooled down to look like silver, this last melting grew sombre and stony, ending by looking of a blackish-grey.
I was still watching the fading away of the brilliant display, when there was a familiar voice at the door of the building, and my father stepped in to make inquiries about the running off of the molten ore, and as he examined the result, he expressed his satisfaction.
“Mind!” he cried to me, as I was about to touch one of the ingots of lead with my toes. “My good boy, these will not be cool enough to touch yet. They retain the heat for a long while.”
He stopped talking to me for some time, and explained how the men were closing the bottom of the furnace again with fire-clay, and that they would now go on pouring in at the top barrows full of charcoal and broken-up ore. How that dark grey stuff was the molten stones and refuse which remained after the metal had been cleared, and then he laughed at what he called my innocence, as I asked him if the ingots, as he called the square masses which now looked quite white, were silver.
“No, my boy,” he said; “we are not so rich as that. If those pieces of coarse metal, when melted down again, and submitted to a fresh process, give us three pounds’ weight of silver out of every hundred pounds of lead we shall do well. Now then, would you like to go down the mine?”
He spoke as if he expected to hear me decline; but I had made up my mind to go, and he looked quite pleased when he heard me say that I was ready.
“Well,” he said, as we reached the top of the shaft, “I’ll go down first, and you can follow. We can get candles at the bottom.”