152 THE WATT AND THE TREVITHICK ENGINES. 



for not working the Weith mine in a more effectual manner, 

 and he prays the Vice- warden to make the sett void. The 

 trial will come on some time the beginning of July, and by 

 that time I suppose we shall have two fire-engines working 

 thereon. 



"Had Mr. Harvey done as he was desired we should have 

 had one working there at this time, but he has but now begun 

 to do anything to it. We have the cylinder and ends home 

 from Polgooth, and my cousin Simon Vivian is making the 

 tubes. We have the other cylinder from Wheal Treasury, and 

 I have ordered Horton to cast a cock for it the same as that at 

 Dolcoath. We have cut the south lode at the adit level about 

 50 or 60 fathoms east of the engine, and have driven about 20 

 fathoms on it. It turns out about half a ton per fathom at 

 201. a ton. The ground at 40s. per fathom ; this all in a hole, and 

 is better going down. The back is sett to four men at 3s. \\d. ; 

 their time is out this week, and I suppose they must have 5s. 

 next. This may turn out a few thousands, and I think too 

 promising a thing to give up to Mr. Harris. 



" I am happy to inform you that all our friends are in good 

 health, and beg my most respectful compliments to Mrs. Rogers 

 and adopted son ; arid am, 



" Dear Sir, 



" Yours very sincerely, 



"ANDW. VIVIAN. 



" The promised news respecting the engine business I am 

 very anxious to have, as it will I hope make me proud, as proud 

 I shall be when I am able to pay everyone their demands, 

 and have sufficient to carry on a little business to maintain my 

 family and self without the assistance of others. May you 

 succeed in your undertaking and also be independent, is the 

 sincere wish of your friend. John Finnis and others are 

 anxious to know when they will be wanted. " A. V." 



The explosion at Greenwich in 1803 was made much 

 of, though the fault was clearly not in the boiler. Three 



