Parolin period, there were 37 porcelain-makers. The first two periods, under the ownership of Pasquale Antonibon and Parolin, are regarded as much the best, although William Chaffers describes some early pieces by the next owner, Giovanni Baroni, as "very charming", and notes the marks of Fabbrica Baroni pieces belonging to William Ewart Gladstone. Production of porcelain continued intermittently until the Antonibon family resumed operations in 1825. They made some porcelain until 1835, thereafter only making earthenwares of various types. In 1784 Pasquale's son Giambologna was old enough to take over the management of the family assets. Economics and politics Both the Cozzi and Le Nove factories used kaolin from the only known Italian source, Mount Tretto in the Dolomites, now in Schio, controlled by Bortolo Facci. He exploited this position by charging such a high price that Cozzi porcelain was more expensive in Venice than imported pieces. The price rose from 46 lire per carro (load) in 1765 to 100 lire per carro from 1770, then 110 from 1780. By the 1790s the Tretto deposits seemed to be running out. Both Cozzi and Le Nove lobbied the government hard to ameliorate this situation by monopolies and import duties, against each other and foreign manufacturers, but smuggling of foreign porcelain into Venice reduced the effectiveness of these. The Venetian government archives include extensive collections of petitions, complaints and reports throughout the 18th century documenting these efforts by the Antonibons and other owners, and some allegations of sabotage at the factories, enticing away of workers, and the theft of moulds. According to some scholars, the samples of supposed "Le Nove porcelain" sent by Antonibon to the Venetian government supporting a licence application in 1758 may actually have been made by the long-closed Vezzi porcelain factory in the 1720s, with painted decoration recently added in Nove. Before they began making porcelain, the Antonibons already enjoyed water rights enabling them to build grinding-mills, a ban (shared by other manufacturers) on their workers joining competitors without a four-year break, and from 1756 a monopoly on the manufacture of maiolica within five miles of Nove, affecting at least one rival in nearby Rivarotta. However, the Antonibons attempts to get a monopoly on the use of moulds were never successful. A local competitor complained of Pasquale Antonibon's "haughty and fierce nature" and the "authority and diligence" he used to get his way. In 1773 the various privileges