As we have already observed it is the unexpected that happens in California history. In this same month of January, 1848, gold was discovered in the upper Sacramento Valley, an event that rivals the discovery of America by Columbus, if regarded in the light of results affecting the development of modern society. "The Gold that Drew the World" so Edwin Markham heads his story of that strange hegira which converted far-away California into a new Mecca and made of San Francisco, that sleepy Spanish Pueblo, in a few months' time a cosmopolitan city of fifty thousand people. Two years earlier, as a result of the Mexican War, California had been declared an American Territory, though not formally ceded to the United States until February 2, 1848. It was generally believed that the Mexican War had been waged and California acquired in the interest of negro slavery. James Russell Lowell voices this belief in the Bigelow papers as follows: "They just wanted this California So's to lug new slave states in, To abuse ye and to scorn ye, And to plunder ye like sin." However this may have been, it is certain that among the immigrants of the fifty's there was a large number of forceful and brilliant men, loving the old South, and fully determined to swing the new state into line as a pro-slavery asset. It is true they were not strong enough to prevent the adoption in 1849 of a constitution prohibiting slavery, yet for all that, as Southern men they rejoiced when September 9, 1850, California was admitted to the Union. It is no part of our purpose to give in detail the strange story of California during her first ten years as an American Commonwealth. By 1850 her population had increased to 120,000 people, mostly young men drawn by the lure of gold from every quarter of the civilized world, including not less than 4000 Chinese. Yet the majority were Americans, and of the Americans the larger number were from the slave states. Nor was this condition much altered up to the outbreak of the Civil War. Trustworthy authorities estimate that not less than forty per cent of her entire population were at that time of Southern birth, naturally Democratic in politics and for the most part pro-slavery in sentiment. It should be remembered that during the decade under consideration the national government was under the brilliant leadership of the slave-masters who were ever alert as to the attitude of this new Eldorado of the West. Consequently every position of trust and honor under national control in California was given to "safe men" whose attitude towards the "peculiar institution" was favorable beyond suspicion. To such an extent was this a matter of public knowledge that the Customs Station of San Francisco was popularly dubbed the "Virginia Poor House." During all these years California was under the absolute control of the Democratic Party, and the party was under control of its Pro-slavery leaders.