A voyage to the River Sierra-Leone : on the coast of Africa : containing an account of the trade and productions of the country, and of the civil and religious customs and manners of the people : in a series of letters to a friend in England / by John Matthews ... ; during his residence in that country in the years 1785, 1786, and 1787 ; with an additional letter on the subject of the African slave trade ; also, a chart of part of the coast of Africa, from Cape St. Ann, to the River Rionoonas ; with a view of the island Bananas.