Note 1 — Chapter III · ISLAND OF MULL AND ADJOINING COAST.
Reading edition
Geikie, Proc. Roy. Soc. Edinburgh (1867); Brit. Assoc. Rep. (Dundee, 1867); "Tertiary Volcanic Rocks of the British Isles," Quart. Journ. Geol. Soc., vol. xxvii. p. 279; also, "History of Volcanic Action in British Isles," Trans. Roy. Soc. Edin. (1888); Judd, "On the Ancient Volcanoes of the Highlands," etc., Quart. Journ. Geol. Soc., vol. xxx. p. 233; and Volcanoes, p. 139.