This document dates from 1817. It grants freedom to a 25-year-old slave named Moses. SWNS.com The document pre-dates Abraham Lincoln's Emancipation Proclamation by more than 30 years. SWNS.com The slave's owner, Oswald Ricks of Virginia, gives as a reason that he should "do unto others as I would be done by." The auction will take place in Gloucestershire and will be run by auctioneers Dominic Winter in Cirencester.