VARIOUS INVENTIONS. 5 



right included, about ^207. If it is a rotative engine, with a 

 winding barrel, it will cost 270?. I expect that a 7-inch 

 cylinder would be sufficient for winding at Penberthy Crofts, 

 which, might have a crank on'tlie fly for lifting water in pumps, 

 and a winding barrel on its back. This would cost about 1701. ; 

 the erection of them, when on the spot, will cost nothing. You 

 do not say when you intend to be in town. I hope you will be 

 present when the dock-engine is set to work. 



" The engines first sent to Cornwall, must be from Coalbrook- 

 dale ; then they will be well executed, but from Wales it would 

 not be so. 



" You may depend on having a real good engine sent down, 

 with sufficient openings given to the passages. 



" The engineer from the Dale has been lately in London, 

 and has just returned ; he gives a wonderful account of the 

 engines working in London. There are twelve now at work 

 there. They have well established their utility in different 

 parts of the kingdom, and any number would sell. The founders 

 intend to make a great number, of different sizes, and send them 

 to different markets for sale, completely finished, as they stand. 



" You do not say anything about wheels to the engine for 

 Penberthy Crofts. There are several engines here nearly 

 finished ; if they suit in size for Penberthy, one may be sent 

 down in four or five weeks, otherwise it may be two months. 



" I am, Sir, 



" Your very humble servant, 



" KICHAKD TBEVITHICK. 

 " Direct for me at the Talbot Inn, Coalbrookdale." 



Trevithick worked hard and successfully in making 

 his steam-engines useful, and firmly believed that he 

 could and would make them universal labourers. Even 

 the Spanish merchants, unacquainted with steam, talked 

 of giving an order for several engines for South Ame- 

 rica ; and their glowing account of the wide field open 

 to him may have been instrumental to his going to 



