In 1852 the Legislature passed a rigid Fugitive Slave Law intending to bar slavery from the State. The mischievous clause of this measure was that all slaves who had escaped into or were brought to California previous to the admission of the State to the Union were held to be fugitives, and were liable to arrest under the law, although many of them had been in the State several years, during which they had accumulated considerable property. The pro-slavery element not only profited by this, but the interpretation of this law by many of the Judges enabled them to bring their slaves into the State, work them in the mines, and return to the south and back to slavery with their Negroes.[36] If they did not wish the trouble of their return passage they auctioned them off to the highest bidder. It also enabled them to make fortunes by selling to the slaves their freedom, charging them twice and often thrice the price he could have possibly brought on the other side of the Rocky Mountains.[37] In certain southern counties of the State it was unpopular to speak in behalf of the slaves. In 1855 Chase and Day, two Abolitionists of Alameda County, were ridden on a rail, ducked and otherwise maltreated.[38] That same year expired the Fugitive Slave Law which had been renewed from year to year to enable slave-owners to reclaim fugitives who had sought refuge in that State prior to its admission to the Union. Fearing that this might be followed by other legislation hostile to their class, the Negroes held a convention in San Francisco that year to discuss their rights, their treatment by the white people, politics, principles and necessity of education. The Fugitive Slave Law was not reenacted.