In the summer of 1820 the Irish-born artist William Guy Wall (1792–after 1864) went on an extended sketching tour of the Hudson River Valley and its environs. Master printmaker John Hill (1770–1850) engraved Wall's watercolors for The Hudson River Portfolio, which was published by Henry J. Megarey between 1821 and 1825. Long considered a cornerstone in the development of American printmaking and landscape painting, the Portfolio's twenty topographical views, with accompanying descriptive texts, follow almost the entire course of the Hudson River. The first series of prints to make Americans aware of the beauty and sublimity of their own scenery, the seminal Portfolio helped to stimulate national pride and cultural identity. Wall is often seen as a forerunner of the Hudson River School. See Wall, View Near Hudson (1820).