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Published online by Cambridge University Press: 14 March 2018
1 Robert Philips Greg (1826-1906), biography with portrait in Min. Mag., 1907, vol. 14, pp. 268-271. His mineral collection, which included that of Thomas Allan (1777-1833), was purchased for the British Museum in 1860, together with the 3-vol. Allan-Greg manuscript catalogue.
2 William Garrow Lettsom (1805-87) was in the diplomatic service in many countries. Biographical note in Monthly Notices Roy. Astron. Soe., 1888, vol. 48, pp. 165-166. His mineral collection passed to William Nevill of Godalming and later to Charles Hampton Turner of Godstone, Surrey. These all came into the collection of Henry Ludlam, which in 1880 he bequeathed to the Museum of Practical Geology (now Geological Survey Museum). The collection of Lettsom's grandfather, John Coakley Lcttsom (1744-1815), was the foundation in 1793 of the Mineralogical Museum of Harvard University.
3 L. J. Spencer, Supplementary list of British minerals. 68th Report Brit. Assoc. Adv. Sci., 1899 (for 1898), pp. 875-877 ; reprinted in Geol. Mag., 1899, decade 4, vol. 6, pp. 75-76; Zeits. Kryst. Min., 1900, vol. 32, pp. 287-289.
4 Second supplementary list of British minerals. Report Brit. Assoc. Adv. Sci., 1932 (for 1931), centenary vol., London, p. 378 [M.A. 5-85].