Hibernia's free trade: or, A plan for the general improvement of Ireland : peculiarly adapted to a free trade. In three parts. Parts I. and II. On building in water, and doing sundry works, in quaking bogs, morasses, &c. such as bridges, roads, inland navigations, moles for reclaiming land, draining bogs, &c. and also, on building substantial stone-piers; to make commodious harbours, light-houses, quays, tongues, &c. in the sea; and other matters that may be useful in all nations. Part III. On improving the commercial and landed interest of Ireland; and briefly demonstrating, that not only Great-Britain, but the whole British Empire, may gain proportionable advantages thereby. Illustrated with sixty-four copper-plates. By George Semple.