Handwritten article on the geology of Grande [sic Gran] Canaria and the way in which the rocks were formed. Seeming to be a summary of Lyell's observations while on the island, 1855 - it is not in his handwriting, and is perhaps written by Mary Lyell, or Georg Hartung.

Document entitled Trap Conglomerate discussing the geological history of Strathmore and the formation of the rocks in the area, c1822-1824. Written on the back of a piece of text entitled Asia which relates to the geology of the Steppe area of Russia between the Caspian and Black Seas.