ability to be beaten into fine foil with just one ounce producing 750 leaves four inches square. Fine gold wire can be woven into cloth, although imperial clothes usually combined it with natural fibres like wool. He once saw Agrippina the Younger, wife of Claudius, at a public show on the Fucine Lake involving a naval battle, wearing a military cloak made of gold. He rejects Herodotus's claims of Indian gold obtained by ants or dug up by griffins in Scythia. Silver, he writes, does not occur in native form and has to be mined, usually occurring with lead ores. Spain produced the most silver in his time, many of the mines having been started by Hannibal. One of the largest had galleries running up to two miles into the mountain, while men worked day and night draining the mine in shifts. Pliny is probably referring to the reverse overshot water-wheels operated by treadmill and found in Roman mines. Britain, he says, is very rich in lead, which is found on the surface at many places, and thus very easy to extract; production was so high that a law was passed attempting to restrict mining. Fraud and forgery are described in detail; in particular coin counterfeiting by mixing copper with silver, or even admixture with iron. Tests had been developed for counterfeit coins and proved very popular with the victims, mostly ordinary people. He deals with the liquid metal mercury, also found in silver mines. He records that it is toxic, and amalgamates with gold, so is used for refining and extracting that metal. He says mercury is used for gilding copper, while antimony is found in silver mines and is used as an eyebrow cosmetic. The main ore of mercury is cinnabar, long used as a pigment by painters. He says that the colour is similar to scolecium, probably the kermes insect. The dust is very toxic, so workers handling the material wear face masks of bladder skin. Copper and bronze are, says Pliny, most famous for their use in statues including colossi, gigantic statues as tall as towers, the most famous being the Colossus of Rhodes. He personally saw the massive statue of Nero in Rome, which was removed after the emperor's death. The face of the statue was modified shortly after Nero's death during Vespasian's reign, to make it a statue of Sol. Hadrian moved it, with