Letters concerning the trade and manufactures of Ireland [electronic resource] : principally so far as the same relate to the making iron in this kingdom, and the manufacture and export of iron wares, in which certain facts and arguments set out by Lord Sheffield, in his Observations on the trad and present state of Ireland, are examined. By Sir Lucius O'Brien, Bart. With a letter from Mr. William Gibbons of Bristol, to Sir Lucius O'Brien, Bart. and his answer. To which is added, the resolutions of England and Ireland relative to a commercial intercourse between the two kingdoms.