1860 1st Ed. 12mo. [viii] + 116pp. + [iv] + 24pp. publ. adverts. Frontis and 7 engraved plates and text Ills., folding map, lightly marginal browning and occasional spotting and thumbing, brown advert. e.ps.,  original gilt (faded) lettered blind embossed green cloth, edges worn with minor fraying, wear to top and bottom of spine.

An 1860 first edition geological survey comparing the glacial history of Switzerland and North Wales. It contains wood-engravings and a folding map used to document technical evidence for ancient glacial movement in the Snowdonia region.