Note 26 — Chapter XXIX · THE CARBONIFEROUS VOLCANOES OF ENGLAND
Reading edition
Student's Manual of Geology, 2nd edit. (1863), p. 523. For a general résumé of the proofs of contemporaneity furnished by the toadstones, see "The Geology of North Derbyshire," by Messrs. A. H. Green and A. Strahan (Memoirs of the Geological Survey, 2nd edit. (1887), p. 123).
[27] In the first edition of the Memoir on the Geology of North Derbyshire, published in 1859, the authors of which were Messrs. A. H. Green, C. le Neve Foster and J. R. Dakyns.