He left Carson City one day, after becoming involved in a duel, the result of an editorial squib written in Goodman's absence, and went across the Sierras to San Francisco. The duel turned out farcically enough, but the Nevada law, which regarded even a challenge or its acceptance as a felony, was an inducement to his departure. Furthermore, he had already aspired to a wider field of literary effort. He attached himself to the Morning Call, and wrote occasionally for one or two literary papers--the Golden Era and the Californian---prospering well enough during the better part of the year. Bret Harte and the rest of the little Pacific-slope group were also on the staff of these papers, and for a time, at least, the new school of American humor mustered in San Francisco. The connection with the Call was not congenial. In due course it came to a natural end, and Mark Twain arranged to do a daily San Francisco letter for his old paper, the Enterprise. The Enterprise letters stirred up trouble. They criticized the police of San Francisco so severely that the officials found means of making the writer's life there difficult and comfortless. With Jim Gillis, brother of a printer of whom he was fond, and who had been the indirect cause of his troubles, he went up into Calaveras County, to a cabin on jackass Hill. Jim Gillis, a lovable, picturesque character (the Truthful James of Bret Harte), owned mining claims. Mark Twain decided to spend his vacation in pocket-mining, and soon added that science to his store of knowledge. It was a halcyon, happy three months that he lingered there, but did not make his fortune; he only laid the corner-stone. They tried their fortune at Angel's Camp, a place well known to readers of Bret Harte. But it rained pretty steadily, and they put in most of their time huddled around the single stove of the dingy hotel of Angel's, telling yarns. Among the stories was one told by a dreary narrator named Ben Coon. It was about a frog that had been trained to jump, but failed to win a wager because the owner of a rival frog had surreptitiously loaded him with shot. The story had been circulated among the camps, but Mark Twain had never heard it until then. The tale and the tiresome fashion of its telling amused him. He made notes to remember it. Their stay in Angel's Camp came presently to an end. One day, when the mining partners were following the specks of gold that led to a pocket somewhere up the hill, a chill, dreary rain set in. Jim, as usual was washing, and Clemens was carrying water. The “color” became better and better as they ascended, and Gillis, possessed with the mining passion, would have gone on, regardless of the rain. Clemens, however, protested, and declared that each pail of water was his last. Finally he said, in his deliberate drawl: “Jim, I won't carry any more water. This work is too disagreeable. Let's go to the house and wait till it clears up.”