British ships Congo and Dorothy surveying the rivers Congo and Niger according to the Dutch newspaper De Curacaosche courant dated 14 June 1817

An item referred to a newspaper published in London, England reporting that the British schooner HMS Congo and the transport Dorothy returned from Bahia, Brazil at Portsmouth, England. They surveyed the river Congo with the intention to find out if there was connection with the river Niger. The expedition was force to go at land while the schooner was not able to pass the river lacking good anchorages.