Note 5 — Chapter XXIX · THE CARBONIFEROUS VOLCANOES OF ENGLAND
Reading edition
Mr. Teall, op. cit. p. 244. Quart. Journ. Geol. Soc. xxxix. (1884), p. 656, and Proc. Geol. Assoc. (1886). See also Prof. Lebour, Geology of Northumberland and Durham, chap. xi.