A true state of the present difference between the Royal African Company and the separate traders : shewing the irregularities and impositions of the joint-stock managers : the uselesness of their forts : the expence they are at in the maintenance of the same : the charge of supporting them in a condition of defence : the vast sums they have receiv'd by the ten per cent. duty in order thereunto, and what has been misapply'd to their own private uses : the advantages and reasonableness of an open trade to Africa : and lastly, the danger of an exclusive trade, not only to the traders of south and north Britain but to our American plantations