We dined very pleasantly, and the Greek was delighted because I
pronounced his Cerigo excellent. In the course of conversation he
inquired laughingly why I had bought one of his flagons of mercury.

"You can find out if you come to my room," I said.

After dinner we repaired to my room, and he found his mercury divided in
two vessels. I asked for a piece of chamois, strained the liquid through
it, filled his own flagon, and the Greek stood astonished at the sight of
the fine mercury, about one-fourth of a flagon, which remained over, with
an equal quantity of a powder unknown to him; it was the bismuth. My
merry laugh kept company with his astonishment, and calling one of the
servants of the inn I sent him to the druggist to sell the mercury that
was left. He returned in a few minutes and handed me fifteen carlini.

The Greek, whose surprise was complete, asked me to give him back his own
flagon, which was there quite full, and worth sixty carlini. I handed it
to him with a smile, thanking him for the opportunity he had afforded me
of earning fifteen carlini, and took care to add that I should leave for
Salerno early the next morning.

"Then we must have supper together this evening," he said.

During the afternoon we took a walk towards Mount Vesuvius. Our
conversation went from one subject to another, but no allusion was made
to the mercury, though I could see that the Greek had something on his
mind. At supper he told me, jestingly, that I ought to stop in Portici
the next day to make forty-five carlini out of the three other flagons of
mercury. I answered gravely that I did not want the money, and that I had
augmented the first flagon only for the sake of procuring him an