3.1 million enslaved people trafficked to the British colonies

John Mangles (1759-1837), London merchant and ship chandler, co-owner alongside his brother James Mangles (q.v.) and a group of Jamaican merchants and slave-owners of two slaving voyage from London by the Rio Nova to Popo and Jamaica in 1791 and 1792 under Robert Moulton (q.v.). John Mangles left £100,000 in personalty in 1837, and his family in his generation embedded themselves among the English elites. The partnership of John, James and Robert Mangles of Wapping as ship-chandlers was dissolved 01/05/1815, and continued under the firm of James and Robert Mangles and Co.