ON THE DETRITAL TIN-ORE OF CORNWALL. 225 
Gold has been found mixed with stream-tin-ore in Kenwyn,*t 
Ladock,t Probus,* Creed,* Saint Ewe,* Saint Mewan,* Gorran, § 
Saint Stephen’s, Saint Austell, ||§]** Lanlivery,}} and Lostwithiel ;1 + 
but the entire produce of the County can scarcely have exceeded 
a few lbs. As, however, no single mass, yet discovered, has 
weighed an ounce,§§ as the specimens have rarely exceeded a 
penny-weight, as many weigh but a few grains each, and as still 
greater numbers are even smaller, there may be ground for 
suspicion that no considerable extent of tin-ground is absolutely 
destitute of gold,||\) but that much has escaped notice from the 
smallness of the particles and the inexperience of the workmen. 
Masses of Jew’s-house tin] have been discovered in several 
* Borlase, Natural History, p. 214. 
{ Michell, Manual of Mineralogy, p. 2. 
+ Hawkins (Sir Christopher), Cornwall Geol: Trans: i, p. 235. 
§ Captain James Knight, Superintendent of the Stream-work, MS. 
|| Klaproth, Mineralogical Observations, p. 12. 
q Petherick (W.) and Martin, Journal of the Royal Institution of Corn- 
wall, iii (No. Xi.) p. xiii. 
** Forbes (David), London, Edinburgh, and Dublin Phil: Mag: xxxvii, 
(1869), 323. 
+4 Ante, p. 215, 216. 
tt Borlase, Journal of the Royal Institution of Cornwall, i, (No. iv.) 
Supplement, p. 35. 
§§ ‘‘ The largest piece [of gold] found in Cornwall...is that in the pos- 
“session of William Lemon, Esq., of Carclew, which weighs in gold- 
‘‘coin three pounds and three shillings, or fifteen pennyweights and sixteen 
‘“orains...It appears to have come from a vein half an inch wide at a medium. 
‘‘On each side it has a light-brown, fatty earth, which is the only impurity 
‘it is mixed with. It was found in the parish of Creed, near the borough of 
‘““Granpont.” Bortase, Natural History, p. 214. 
\||| ‘Mx. Rosewarne [one of the principal tin-smelters in Cornwall] 
“suspects, as he informs me, that there is gold, more or less, in all stream- 
‘tin in the County.” Ibid, p. 214. 
qq ‘‘ In the stream-works in St. Stephen’s Branel, they find now and then 
‘“‘gome small lumps of melted tin, two inches square and under:...this kind 
‘¢euts with difficulty, and more harsh and gritty than the common melted 
‘tin... These fragments I look upon as fragments...scattered from the 
«¢ Jewish melting-houses.” Bortase, Natural History, p. 163. 
- “In May 1765 was found near St. Austle by some streamers, a large 
“cake of Tin-ore, weighing about six pounds, irregular in shape,...lying 
‘ about 5 feet under the surface, and in the middle of that Stratum of Tin- 
“ore so remarkably spread in the Moor adjoining to the foremention’d town. 
