Board--Watt's steam-cylinder unsuitable for high steam, 1806--Sims' trial of engines--Little fight--Tubular boilers, 1806--High-pressure steam pumping engines, 1818--Reporter of engines--Application to Government, 1810--Dolcoath engines and boilers--High steam to the Watt engine--Duty of engines, 1812--Watt's boiler thrown out--Expansive valve--Dolcoath manager--Saving by boilers and expansive working, 1812--Lean's reports--Increased duty of the three old Dolcoath engines, 1814--76-inch engine, 1816--80,000l. a year saved--Durability of engine--Its removal--Cylindrical boilers--Hornblower and Watt engines--Davies Gilbert's report, 1798--Lean's report, 1816--Watt's views of expansive working--Watt's steam of 1 or 2 lbs. to the inch--Pole's statement--Engine at Marazion, 1804--Woolf in Cornwall--Rees' Cyclopædia--'Encyclopædia Britannica'--Application to Parliament--Wheal Towan--Newcomen and Watt engines--Pompe-à-feu 'La Belle Machine,' Dolcoath Page 114-194 CHAPTER XXI. ENGINES FOR SOUTH AMERICA. Engines for Lima, 1813--Uville's application to Watt--High-pressure model--Cerro de Pasco mines--Uville's return in search of Trevithick--Engines ordered--Pump-work--Modern pumping engines--Money difficulty--Weight of pieces--'Sanspareil' of 1813--Expansive working--Quartz crusher--Locomotive for South America, 1813--Sketch of winding engine--Their simplicity of form--Power and cost of engines--Trevarthen and Bull to accompany the engines--A third man recommended--Boilers put together at Cerro de Pasco--Uville's arrest--Trevithick a shareholder--Vivian's application--Departure of machinery, 1814--Uville's agreement--Invoice of engines sent Page 195-220 CHAPTER XXII. PERU. Agreement for working the Peruvian mines, 1812--Uville and Watt, 1811--Uville and Trevithick, 1813--Uville's opinion of Trevithick--Estimated value of the mines--Machinery reached Peru, 1815--Trevithick's departure from Penzance, 1816--Mr. Edmond's statement--Cerro de Pasco mines in 1850--Report from the Viceroy of Peru, 1816--Report from the Magisterial Deputation of Yauricocha, 1816--Despatch from the Governor of the Province of Tarma, 1816--Pumping engines at work--The Viceroy's reply--Report in the 'Lima Gazette,' 1816--Trevithick's reception at Lima--Trevithick's report, 1817--Differences between Trevithick and Uville--Trevithick's thoughtless acts--His visit to the nunnery--The Lord Warden proposed to erect a statue in silver to Trevithick--Bust of Trevithick in Cornwall--Quicksilver--Sunk ship--Chili--Copper and silver mine--Departure from Lima--Cerro de Pasco mines Page 221-259 CHAPTER XXIII. COSTA RICA.