Giekie, Archibald, (1879), ‘On the Carboniferous Volcanic Rocks of the Basin of the Firth of Forth: their Structure in the Field and under the Microscope, off print from Transactions of the Royal Society of Edinburgh, v.29, pp. 437-518 +3 plates, removed from sammelband volume. With m/s ‘John Evans Esq. FRS, with AG’s Kind regards’. Quarto format. Plates include small scale b/w map showing volcanics, colour microphotographs and columns showing the stratigraphic succession over five counties. Age-toned, clean. In very good condition. This paper and several others were distilled into Geikie’s opus, The Ancient Volcanoes of Great Britain (1897).