Note 73 — Chapter III · HISTORIC CAVES IN BRITAIN.
Reading edition
See Essays by the writer in “Pop. Sci. Rev.” Oct. 1871: “On the relation of the Pleistocene Mammalia to the Glacial period.” “On the Classification of the Pleistocene Strata of Europe by means of the Mammalia;” Quart. Geol. Journ. June 1872.