The Earl Grey blend, or "Earl Grey's Mixture", is assumed to be named after Charles Grey, 2nd Earl Grey, British Prime Minister in the 1830s and author of the Reform Bill of 1832 and the Slavery Abolition Act of 1833. He reputedly received a gift, probably a diplomatic perquisite, of tea flavoured with bergamot oil as a result of his ending the monopoly held by the East India Company on trade between Britain and China. A "Grey's Tea" is known from the 1850s, but the first known published references to an "Earl Grey" tea are advertisements by Charlton & Co. of Jermyn Street in London in the 1880s.