sentences:  In the 19th century, many religious Americans found it difficult to continue supporting the enslavement of their brothers in Christ, especially amongst the Quakers.Two examples of such Christians are Reverend Moses Tichnell and Reverend Samuel R. Houston, who freed slaves and sent them to Liberia in 1855 and 1856 respectively.These two men, believing that they were morally obligated to finance such voyages, played an important role in the colonization movement.