Leaders of the Puerto Rican abolitionist movement, including José Julián Acosta, Francisco Mariano Quiñones, Julio L. de Vizcarrondo, Ramón Emeterio Betances and Segundo Ruiz Belvis, waged a long struggle to end slavery on the island. On March 22, 1873, the Spanish National Assembly finally abolished slavery in Puerto Rico. The owners were compensated with 35 million pesetas per slave, and slaves were required to continue working for three more years. See Picture Gallery