206 © ON THE DETRITAL TIN-ORE OF CORNWALL. 
The remains of an ancient smelting-furnace, and of block- 
moulds in the rock are said to have been discovered between Pulla 
and Higher Coisgarne, in Gwennap ;* and in the east of Kea a 
mass of Jew’s-house-tin was found.+ 
About half-way from Tarnon-dean to the Arsenic manufactory, 
—towards the middle of the vale,—and at sixteen or eighteen 
feet below the surface, some two or three tons of large, rough, 
angular masses of quartz,—closely resembling those imbedded in 
the sub-soil of the neighbouring common were found resting on 
the bed (2) of silt, shells, and vegetable matter. Immediately 
beneath the stones,—and within compass of the layer of animal, 
vegetable, and mineral substances on which they rested—at some 
SKELETON 
Discovered resting on the TIN-GROUND 
BETWEEN TARNON-DEAN AND THE ARSENIC-WORKS, PERRAN-AR-WORTHAL. 
Drawn By Mr. H. M. GEorrrot. 
From a Sketch by the late Reverenp Canon Roczrs, M.A., of Penrose. 
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* ‘Some years ago Mr. Polkinghorne discovered [near Higher Cois- 
‘‘ garne-mill] an ancient furnace where tin was smelted and formed into 
“blocks. The furnace contained a large quantity of charcoal-ashes and 
‘ half-burnt wood; and the moulds for forming the metal into blocks were 
‘found cut in the rock.” Francis, Gwennap; a Descriptive Poem, p. 100. 
Parochial History of Cornwall, p. 143. 
+ ‘ Muriate of tin was first discovered in a specimen of Jew’s-house-tin 
“ .,..found in a low boggy ground in the Parish of Kea, accompanied by a 
‘‘ stratum of charcoal.” Micurxu, (Joun), Manual of Mineralogy, p. 74. 
