Great-Britain's commercial interest explained and improved [electronic resource] : in a series of dissertations on the most important branches of her trade and landed interest : with an essay, shewing the great advantages which would certainly accrue to England, from an union with Ireland : also a clear view of the state of our plantations in America, their constitution, trade, and revenues, with a certain method to encrease their commerce and strength / by Malachy Postlethwayt.