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Published online by Cambridge University Press: 01 May 2009
My thanks are due to Mr. Tiddeman, for his reply to the letter from me, which appeared in your February Number. I may perhaps be allowed to add a few words more upon the subjects under discussion.
page 164 note 1 Geol. Journ., vol. xxviii., p. 481.
page 165 note 1 Geol. Journ., vol. xxii., p. 564.
page 165 note 2 Geol. Mag., Vol. IX., p. 395.