999 ON THE DETRITAL TIN-ORE OF CORNWALL. 
tin-ore obtained in Cornwall was from this district ;* and, probably 
the greater part was detrital. Three hundred years later the 
returns from East Cornwall had dwindled to less than one-sixth 
of their previous amount; and at present they are comparatively 
* The following columns show the quantities of tin on which duties 
were paid to the Duchy of Cornwall, at the several Coinage towns, during 
different periods :— 
PERIODS. 
T 1305—1306. 1577—1607. 1837—1838. 
owns. Total. One year. | Average of forty years. |} Total. One year. 
Calstock ......0. S060 6566 73:7 tons, Avoir. 
Bodmin ........| 74:3tons,Avoir: sievete Svalere 
Liskeard ........ Sieteee 22-3 tons, Avoir. Serars 
Lostwithiel......| 201° ,, a BPA 55 PA eeseie 
Saint Austell.... Sreiets 5000 sleeve 
EWU Olircisseyevershereers 68:75; 5 IGA 50 5 1930 ./aee eee 
Toynu [? Truro] .| 36:3 ,, ye sistene iisiele 
elstonwecemrceeli) uOsLans i UO BRS - 5. 3 ceeaee 
lel so00000000 afelere 9000 102225 emnes 
Penzance ...... 0000 a ecare 2,329°3 4, 5, 
Motalaeeraciieiceene locosty. “4 sistent BIS) 5 ay 
Average ........ 0000 420°8_,, 90 6000 
The Coinages were held at the several privileged places during the 
undermentioned times ; viz :— 
16th Nov., 1305— 
Towns. ist Sepi,, 1306, | 1687—1835. | 1835—1838. 
GAllewnoale codhsododgo000000dc ealias aaa 8 
AB OO TINIE AW eyaiayeusis eieeieleletersserstavs 4. eteals meres 
Miiskeands ee Gon Meveveiere 6 Keen Stole 8 5000 
DORM 5546 6000500000000 22 24 S000 
Saint Austell for Cinemas 16 
town and Pentuan nai} ee sah cche 
DVUGOR aeieeleeeries Aas pravereie ater 4 48 48 
Moya i? EL ULOM Pp teyercleneleeistors 2 2000 o000 
IETVOISG OT cece tsttereitenie monies 1 8 16 
EV aivilewurceveleletevcesiclaistolemcraieferst ailers aseete 24. 
8 
PCN ZANICOieisvcrereiciel oletstetercloveiels ioloie { 24 \ A8 
From 1753, 
A Coinage being thus eventually established at every port in the tin 
districts. 
