MEMOIRS OE TIIE GEOLOGICAL SURVEY. SPECIAL R EPORTS ON THE MINER AL _4 RESO URCES OF GREAT BRITAIN. — L XX II . VO . V COPPER OR ES COR NWALL AND DEVON D H ENRY EWEY. ’ P BLIS E B OR DER OF T‘I E’ LOR DS COMMI SSIONER S OF H IS MAJESTY S R S U H D Y T EA U R Y. L O N D O N PR INTED UNDER THE AUTHORITY OF H IS MAJESTY ’S S A I N FFI T T O ERY O CE . To b e pur c h ased from 12 1 and 14 L N A E E S ANF D LTD . 3 G CR LON D N 2 . O W . C. T OR , , , , , O , , ; A L D 8 K J T . 6 AN O ER E ET D N B H W . NS N ST I R G OH TO , , , H V R , E U ; LTD D I I o . 20 N AS A TR EET and G F GG S C . HO ES , , , , S U S , 1 18 FR E D ER I C TR E ET D LI N 7 , K S , U B ; or from any Agent for th e sale of Ordnance Survey Maps ; or thr ro th e D AL ough any Bookseller ; f m IR ECTOR GENER . R DN AN CE S R E S U TH A MP T N O U V Y , O O . 0 MEMOIRS OF THE GEOLOGICAL S RVEY U . SPECIAL R EPO RTS ON THE MINERAL RESO URCES OF GREAT BR ITAIN. X — PP R L X I I . C R VO . V O E O ES COR NW ALL AN D DEVON D HENRY EWEY . ’ PUBLISH ED BY OR DER OF TH E LOR DS COMMI SSIONER S OF H IS MAJESTY S TR EASU R Y. L O N D O N PRINTED UNDER THE AUTHORITY OF H IS MAJESTY’S A I I ST T ON ERY OFF CE . To b e purchased from . S AN D E N D N Z F L D 12 1 and 14 L N G ACR L O. T . 3 W . E T OR , , , , , O , O O , ; . A K . J L 8 AN ER TR E E T D I NB R GH . NS N TD . 6 S W OH TO , , , H OV , E U ; DG FI GGI L 2 N A SSA STR E E T and S S Co . TD . HO E , , , 0 , U , 1 7 1 FR E D E R I C TR E ET D BL IN 8 K S , U ; , or fr om any Agent for th e sale of Ordnance Survey Maps ; or h o an oo se le ro th e DI C G N AL t r ugh y B k l r ; f m RE TOR E ER , R DN AN CE S R E S TH AM T N . O U V Y , OU P O 1 923 . Price 28 . 6d. N et. PR EFA E C . The history of mining for c opper - ore in Cornwall and Devon no to o o m e goes back doubt a rem te peri d , but the ti of greatest th e n n activity was about middle of last ce tury , whe this district took a prominent place am ong th e c opp er - producing districts of o in n e in e n o and the w rld . S ce the the d cl e has b en co tinu us in n th e o n e to fi rece t years utput has dwi dl d a very small gure . There is reason to believe that many of th e fam ous old mines are and o - o n to practically exhausted , c pper res have te ded become b - o of n for tin y pr ducts mini g and tungsten ores . n n o e ne o Much has bee writte ab ut thes mi s , th ugh the n n o n n ot of ' l or n fi i formatio is fte a very detai ed scie ti c character , and in th is volume the prin cipal facts concerning the m have n o o e c an bee br ught together , with statistics of utput wher these o n n m o n n o n be btai ed . O ly the more i p rta t mi es or gr ups of mi es h e e e n on n of n ave r c iv d special atte ti , but as the umber mi es which produced only small supplies or were worked for a sh ort perio d nl is and n o n o n n o y very great , the i f rmatio ab ut them ofte sca ty , n o attempt has been mad e to describe every min e which has n yielded copper in Cornwall a d Devon . D h as In order to bring the information up to date Mr . ewey visited every active mine and man y of those recently aband oned r n ur n to n or of hi sto i c imp orta ce . O tha ks are due the prese t n y and n l mine ma agers for their courtes assista ce . Fu l use has been made of the published accounts of mining in Cornwall and D n and e en e to n o in on evo , r fer c the pri cipal s urces of formati o n and will be found in the text and fo otnotes . S me of the pla s sections of min es h ave alread y appeared in Geological Survey Memoir s ; the statistics have been brought up to date as far as A is n n on d n d t in p ossible . l t of the pla s of aba d e mi es eposi ed en n n A n the Min es Departm t is give in a ppe dix . o th e - n h m i and C pies of six i c geological aps , publ shed n sh d on in l of o u publi e , may be c sulted the ibrary the Ge logical L n n S . urvey , o do OH . L ETT J N S F , Director . O fi Geological Survey f ce , 28 n , Jermy Street , I L n n S .W . o do , 2 4th n 1 9 3 . Ja uary , CONTENTS . PR E FA CE BY TH E D I R E CT OR - R D I CH AP TE R I . I TR O U CT ON ine l a c on n c o e . 1 . D u o o f th e M ra s th t tai pp r , p istrib ti n O e . 1 . a c e o f th e o e O e . 3 . H o r s , p Ch ra t rs C pp r r s , p ist ry, . 9 7 . S . p tatisti cs , p P E - D E T I N E CH A T R I I . AIL S OF TH E M S — I . Th e St . us D c . 1 2 1 7 . I I . Th e m o e R e r u J t istri t , pp Ca b rn , d th —41 S c o e Di r c . 1 7 . and rri r st i ts , pp — A IL H E I N E S n ed CH AP TE R I I I . D E T S OF T M (conti u ) — ‘ 42 4 . I . 1 1 1 . Th e St . A u e ll D c . 5 V Th e a on st istri t , pp C rad — 4 4 . D c . 6 5 Th e E a o nw ll and D evon istri t , pp V st C r a — 1 — 4 . Th e u l D . 1 2 D c . 5 6 VI S o o o c 6 6 istri t , pp th M t n istri t , pp AP P E N D IX Plan s of A band o n e d Mines ; L ist o f pu blishe d six - inc h G eologic al m aps of C o rnwall I N D E X ID ( 78 01 941 6 Wt 24550—8 7 50 8 123 lu d‘ S I LL USTR ATI ONS . E T X T FI GU R E S . PA GE — 1 . L evan t Min e L o ngitu din al se c ti on S h eW ing levels and workings — 2 . L evan t Min e . W orkings in Main (or North ) L o d e — 3 . D olc oath Min e . Trans verse s ec ti o n — ’ 4. Wh eal S eto n . S ec ti o n at Ti lly s Shaft — 5 . Wh e al S eto n . S e c ti o n at th e Bu ll Shaft — 6 . Co ns olidate d Mine — 7 . W e P o ldic e e n W o o st Min , U ity d — r 8 . T esavean Min e — 9 . Cons olidate d Min es — 1 0 r Clifi or d Am algam ated Mines — 1 1 . Fowey Cons ols Min e . — l 1 2 Ph oenix Min es . L ongitu din a sec tiOn o f the MainL o de — 1 3 D evo n Great Cons ols .