Note 95 — Chapter XXXI · THE PERMIAN VOLCANOES OF SCOTLAND
Reading edition
Geology of Fife and the Lothians, p. 34. In a reprint of this work, published in 1866, the venerable author briefly remarked in a footnote that he no longer believed in the second period of volcanic activity. This view was adopted in 1875 by Professor Judd, Quart. Journ. Geol. Soc. xxxi. p. 131. For the reasons stated in the text I believe Maclaren's original explanation of the structure of the hill to be correct.
[96] Forbes never published his views regarding Arthur Seat, but expounded them to his class, and explained them in diagrams, some of which are preserved in the Edinburgh Museum of Science and Art, in association with the specimens which he collected from the hill.
[97] Sheet 32, Geol. Survey of Scotland and descriptive Memoir. See also Rep. Brit. Assoc. 1867, address Geol. Sect., and Murchison's Siluria, 4th edit. p. 331.