But the advantages of Sutter's Fort imposed certain obligations on its owner. He should be prepared to furnish provisions to the immigrants. He should not expect the Americans to be content with the Mexican system of crushing grain by hand on the _metate_, as the flat under millstone of the Mexicans and native Californians is called, the upper millstone being cylindrical and used like a rolling-pin. He ought to build a flour-mill in the Sacramento Valley to grind the wheat which he cultivated in considerable quantity. There was no great difficulty about the construction of such a mill. He had a site for it on his own rancho. The necessary timber for it could be found not far away. Among the Americans at the fort there was skill to build and to manage it. These ideas pleased Sutter; he adopted them, and acted on them. He selected a site and made his plans for a flour-mill, and, partly to get lumber for it, he determined to build a saw-mill also. Since there was no good timber in the valley, the saw-mill must be in the mountains. The site for it was selected by James W. Marshall, a native of New Jersey, a skilful wheelwright by occupation, industrious, honest, generous, but "cranky," full of wild fancies, and defective in some kinds of business sense. By accident he discovered the gold of California, and his name is inseparably connected with her history, but it is impossible to make a great hero of him. The place for his mill was in the small valley of Coloma, 1500 feet above the level of the sea, and 45 miles from Sutter's Fort, from which it was accessible by wagon without expense for road-making. Good yellow-pine timber was abundant in the surrounding hills; the water-power was more than sufficient; there were opportunities to make a secure dam and race with small expense, and there was little danger of loss by flood. Sutter left the plans and construction of the mill, as well as the selection of the site, to Marshall, and on the 27th of August the two signed an agreement of partnership under which Sutter was to furnish money, men, tools and teams, and Marshall was to supply the skill for building and managing. While the project of the saw-mill was under consideration some Mormons arrived at New Helvetia and solicited employment. They had belonged to the Mormon battalion, which, after enlisting in Nebraska for one year, marching to the Pacific by way of the Gila, and garrisoning San Diego, had been mustered out at Los Angeles on the preceding 16th of July. They were on their way to Salt Lake, but at the fort received letters advising all who could not bring provisions for the winter to remain in California until the following spring. They were sober, orderly, peaceful, industrious men, and Sutter hired them to work at his flour-mill and saw-mill. He sent six of them to Coloma. Besides these, Marshall had three "Gentile" laborers, and about a dozen Indians. All the white men were natives of the United States.