These victories arose from the determined efforts of a group of lawyers who risked public odium by defending fugitive slaves in court and challenging the long-standing system of black indentured servitude. John M. Palmer, Gustave Koerner, and Orville H. Browning, all future Republican politicians, argued that blacks held to long-term indentures were free, and fought their cases in court without charge. In the 1850s, Lincoln's law partner William Herndon represented fugitive slaves pro bono.