This is a fine example of the 1840 Society for the Diffusion of Useful Knowledge or S.D.U.K. map of Chile and Argentina. It covers Chile and Argentina along with parts of Bolivia, Uruguay. Throughout, the map identifies various cities, towns, rivers, mountain passes and an assortment of additional topographical details. Bolivia's claims to the Atacama Desert and Peru's claims to the Tarapaca region - both of which are today part of Chile, are shown. In Chile, after the last of the Spanish troops surrendered in 1826 and the failure of the federalist system in 1828, Chile adopted a moderate liberal constitution. This in turn alienated both the extreme liberal and federalist factions, ultimately leading to the revolution of 1829 and 30 years of conservative government. This map was originally copyrighted in 1840, but was issued in Volume two of Chapman and Hall's 1844 edition of Maps of the Society for the Diffusion of Useful Knowledge. It was engraved by John Walker of J. and C. Walker.