Dines, H.G. The Metalliferous Mining Region of South-West England vol. II p.650.
Joint-Stock Companies. Return of the names of all companies registered under the Joint Stock Companies Act (1856) with Limited Liability up to the 31st day of March 1858. Parliamentary Papers 1857-1858 p.31
Joint-Stock Companies. Return of the names, objects, places where business is or was conducted, and date of Registration of all Joint Stock Companies ‘Limited’ formed since the passing of the Act 18 & 19 Vict. c. 133. Parliamentary Papers 1859 p.38.
Joint-Stock Companies (Limited). Return of the names, objects, places where business is or was conducted, and date of Registration of all Joint Stock Companies ‘Limited’ formed since the passing of the Act 18 & 19 Vict. c. 133. Parliamentary Papers 1863 p.34.
Joint-Stock Companies. Return of the names, objects, places where business is or was conducted, date of Registration… of all Joint Stock Companies formed or registered since the passing of the Act 18 & 19 Vict. c. 133. 1864 Parliamentary Papers 1864 p.32.
Joint-Stock Companies. Return of the names, objects, places where business is or was conducted, date of Registration… of all Joint Stock Companies formed or registered since the passing of the Act 18 & 19 Vict. c. 133. 1864 Parliamentary Papers 1864 p.136.
List of Mines (Devon) 1860-1861.
List of Mines (Devon) 1863.
List of Mines 1864-1865.
McDonald, D. 1951. Percival Norton Johnson. The Biography of a Pioneer Metallurgist Johnson, Matthey & Co. Ltd, London. 244pp.
Mineral Statistics 1862.
MJ 1844 p.23, 33, 59, 67, 75, 83, 94, 103, 103, 108, 109, 111, 119, 135, 143, 147, 151, 158, 164, 166, 175, 187, 208, 216, 223, 231, 238, 247, 255, 263, 270, 279, 287, 295, 303, 311, 322, 339, 346, 359, 367, 379, 391, 398, 406, 407, 419, 427, 434, 447, 455.
MJ 1845 p.7, 14, 23, 30, 31, 47, 75, 87, 107, 122, 147, 171, 195, 227, 301, 325, 337, 349, 373, 396, 420, 458, 481, 525, 581, 619, 647, 665, 676, 688, 713.
MJ 1846 p.14, 38, 58, 80, 99, 122, 142, 162, 183, 206, 228, 245, 270, 291, 312, 331, 352, 375, 394, 415, 436, 456, 480, 494, 504, 506, 527, 529, 533, 548.
MJ 1847 p.11, 36, 56, 78, 100, 118, 122, 124, 148, 155, 161, 171, 171, 185, 188, 195, 234, 247, 272, 296, 320, 332, 333, 334, 345, 355, 368, 380, 392, 392, 404, 416, 417, 428, 440, 441, 443, 444, 452, 453, 456, 464, 466, 466, 476, 477, 480, 488, 496, 499, 500, 500, 502, 512, 513, 525, 526, 538, 574.
MJ 1848 p.6, 7, 29, 38
MJ 1851 p.4, 15
MJ 1863 p.38
MJ shares listed 1851-1852.
National Archives: BT31/295/1026. BT41/274/1578.
Richardson, P.H.G. 1992. Mines of Dartmoor and the Tamar Valley after 1913. A Monograph of the Northern Mine Research Society, British Mining No.44 p.117.
Stannaries. Return of all mines within the Stannaries of Cornwall and Devon registered as Joint Stock Companies in each year.. from the passing of the Joint Stock Companies Act (1844) to the 31st day of December 1868. Parliamentary Papers 1868-1869 p.1.
Or: Great Wheal Martha Mining Co. Ltd. Great Wheal Martha Consolidated Mines.
See also: Wheal Martha. New Great Wheal Martha. New Great Consols Mine. New Wheal Martha. Wheal Sheba. Sherrall’s Bottoms Mine.