Nice plan of Valparaiso area from Historia Fisica y Politica de Chile, segun documentos adquiridos en esta Republica durante doce annos de residencia en ella, published in Santiago and Paris in 28 volumes + 2 atlas volumes, between 1844 and 1871. In 1830, the French botanist Claude Gay was asked by the government of Chile to make a detailed description of the history, geography, geology and natural history of their country. Gay travelled through Chile during 11 years to do all the scientific research he needed for his work. The result was the present work, the first complete description of Chilean history and a model in modern historiography, with its meticulous examination of sources and documents. The complete set is now on the market for over $50,000.