African memoranda [electronic resource] : relative to an attempt to establish a British settlement on the island of Bulama on the western coast of Africa in the year 1792 : with a brief notice of the neighbouring tribes, soil, productions, &c., and some observations on the facility of colonizing that part of Africa with a view to cultivation and the introduction of letters and religion to its inhabitants, but more particularly as the means of gradually abolishing African slavery / by Captain Philip Beaver.