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 written by George Bingley to Messrs. Robert Scott Fairlie and Company of London and dated April 30, 1835, so that the map cannot be more recent than the date of the letter, and there is evidence that it is older than the letter, for the name Flamenco, one of the tiny copper exporting ports of the coast, is inked in

—Rains at Copiapó are shown by a solid line, The heavy line indicates figures from the continuous series of official meteorological records. The light line indicates deductions from records of the Copiapó Mining Company, the Anales de la Universidad de Chile, the Historia de Copiapó, and other sources, The dashed line shows the rainfall of Piura deduced from various historical sources by Victor Eguiguren (Las Huvias en Piura, Bol. Soc. Geogr. de Lima, Vol. 4, 1895). Floods in Tarapaca are indicated by the letter T.

on the map instead of being printed like the rest (Fig. 50). The border of the map is colored green by means of a wash applied by hand. A similar wash of blue was laid over the border of the sea and over a few supposed lakes near Huasco. Four irrigated farms of the copper company on the Copiapó River are colored dark green. The company’s mining proper- tics are indicated by colored squares, and the names are under-