Note 209 — Chapter VIII · THE PLEISTOCENE CAVES OF GERMANY AND GREAT BRITAIN.
Reading edition
Pengelly, “Literature of Kent’s Hole:” Trans. Ass. Devon. 1868 9–70. Godwin Austen, “Proceed. Geol. Soc.” iii. 286–7. “Trans. Geol. Soc.” vi. p. 433, et seq. Vivian, “Brit. Ass. Rep.” 1847, p. 73.