He was later freed in a prisoner exchange. However 8,000 prisoners have already been freed. Plato then supposes that one prisoner is freed. But the last slaves were not freed until 1827. He freed his own slaves in 1798. He is later freed from prison due to a disease. After that period, few slaves were freed. In 1790 John Burbidge freed his slaves. Centuries later he was accidentally freed and returned to conquer Earth. Viper was later freed from prison by Tyrannus. Two years later, Mosley is freed from prison. Then, in 1871, the sons of the slaves were freed. He is eventually freed, and goes once more into hiding. Peru freed its black slaves in 1854. In Nevis, 8,815 slaves were freed.