The principal copper mine of the area around Tavistock, Wh Franco was a large set extending along the south bank of the River Walkham, with an older part (known as Old Wh Franco) on the western side of the Plymouth to Tavistock Road (Hamilton Jenkin 1974).
Working was initially on the Old Wh Franco Part of the set that between 1823 -43 produced £60000 worth of ore. After the Old Wh Franco set was thought to be exhausted, a shaft was sunk east of the Plymouth to Tavistock Road (the area known as New Wh Franco), which then became the active centre of the mine. Operations continued till 1862, producing £51500 worth of ore.
References:
Mines of Devon, Vol 1: The Southern Area, pp82-83, A K Hamilton Jenkin 1974
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 886.
McConnell (1973).
Mineralogical Magazine (1977): 41.
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UK OS Grid Reference: SX508702
Map Reference: 50°30'43"N , 4°6'16"W
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