Thanks to Dr Peter Riches, the British Geological Survey, the Geologists’ Association and Mary Harris.

Maria Graham

• Broderip, W J, Letter to William Buckland, 21 July 1834. In the personal collection of Dr Peter Riches, FGS.
• Callcott, Mrs, 'Letter to the President and Members of the Geological Society in answer to certain observations contained in Mr Greenough's Anniversary Address of 1834', London: T Brettell (1834).
• Graham, Maria, Journal of a residence in Chile, during the year 1822 : and a voyage from Chile to Brazil in 1823’ (1824).
• Graham, Maria, “An Account of some Effects of the late Earthquakes in Chili”, Transactions of the Geological Society of London, second series, vol 5 (1824), pp413-415.  
• Greenough, G B, 'Anniversary Address of the President', (1834), Geological Society Archives, ref: LDGSL/947/2/2.
• Kölbl-Ebert, M, “Observing Oregeny: Maria Graham's account of the earthquake in Chile in 1822”, Episodes, vol 22 (1999), pp36-40.
• Lyell, Charles, Letter to Roderick Murchison, 15 March 1834, Murchison collection, Geological Society Archives ref: LDGSL/838/L/17/16.
• Mitchell, Rosemary, “Callcott [née Dundas; other married name Graham], Maria, Lady Callcott (1785-1842)”, Oxford Dictionary of National Biography, 2004.
• Thompson, Carl, “Earthquakes and Petticoats: Maria Graham, Geology, and Early Nineteenth-Century ‘Polite’ Science”, Journal of Victorian Culture, Volume 17, Issue 3, September 2012, pp 329-346.

Margaret Crosfield

• Obituary, Proceedings of the Geologists’ Association, vol 64 (1953), pp62-63.
• Burek, C V, “The first female Fellows and the status of women in the Geological Society of London”, Geological Society, London, Special Publications, vol 317 (2009), pp373-407.
• Burek, C V and J A Malpas, “Rediscovering and conserving the Lower Palaeozoic ‘treasures’ of Ethel Woods (neé Skeat) and Margaret Crosfield in northeast Wales”, in  BUREK, C. V. & HIGGS, B. (eds) The Role of Women in the History of Geology. Geological Society, London, Special Publications, 281, pp203-226.
• E E S Brown albums. Geologists' Association, held by the British Geological Survey.
• Carreck archive, Geologists’ Association, held by the British Geological Survey.
• Crosfield archive, Geological Society Archive, ref: LDGSL/337.
• Crosfield/Woods archive, British Geological Survey.
• Crosfield, M C & E G Skeat, “On the Geology of the Neighbourhood of Carmarthen”, Quarterly Journal of the Geological Society, vol 52 (1896), pp523-541.
• Geological Society, Records of the Special General Meetings, Geological Society Archive, ref: GSL/SGM.
• Woods, E G & M C Crosfield, “The Silurian Rocks of the Central Part of the Clwydian Range”, Quarterly Journal of the Geological Society, vol 81 (1925), pp170-194.

Elizabeth Alexander

• Alexander archive, Geological Society Archive, ref: LDGSL/38.
• Alexander FES. ‘Report on the availability of granite on Singapore and the surrounding islands’. Singapore: Government Publications Bureau, 1950.
• Alexander FES. "Observations on tropical weathering: a study of the movement of iron, aluminium and silicon in weathering rocks at Singapore", Quarterly Journal of the Geological Society of London, vol 115 (1959), pp123–144.
• Harris, Mary, "Rocks, radio and radar: Elizabeth Alexander and the DSIR Radio Development Laboratory, 1942–1945", Journal of the Royal Society of New Zealand, 2017, DOI:10.1080/03036758.2017.1291437.
• Harris, Mary, 'Rocks Radio and Radar: The Extraordinary Scientific, Social and Military Life of Elizabeth Alexander', History of Modern Physical Sciences: Volume 4, World Scientific Publishing Ltd, 2019.

Janet Watson

• Barrett, ‘Women at Imperial College: past, present and future,’ World Scientific Publishing Ltd, 2017.
• Bowes, D R, "Janet Watson: an appreciation" in Park, R G & J Tarney (eds), 'Evolution of the Lewisian and Comparable Precambrian High Grade Terrains', Geological Society, London, Special Publications, vol 27 (1987), pp1-5.
• Fettes, D J & J A Plant, "Janet Watson", Biographical Memoirs of the Fellow of the Royal Society, vol 41 (1995), pp501-514.
• Shackleton, Robert M, Obituary of Janet Watson, Geological Society Annual Report, 1985, pp35-37.
• Shackleton, Robert M, 'Watson [married name Sutton], Janet Vida (1923–1985)', Oxford Dictionary of National Biography, 2004.
• Sutton, J & J Watson, “The pre-Torridonian metamorphic history of the Loch Torridon and Scourie areas in the North-West Highlands, and its bearing on the chronological classification of the Lewisian”, Quarterly Journal of the Geological Society, vol 106 (1950), pp241-307.
• Watson, J, “Late Sillimanite in the migmatites of Kildonan, Sutherland”, Geological Magazine, vol 85 (1948), pp149-162.
• Watson archive, Geological Society Archives, ref: LDGSL/1078.