Notes and text for five lectures on geology. Sir Archibald Geikie placed civilisation, religion and mythology in the context of geological development, looking at geolgical formations and the processes and materials involved in their creation.

Letter to Sir Charles Lyell from William Blackadder discussing various geological matters including the heights of diluvium in the Forfarshire area, the lochs in the Forfarshire area and his suspicions that land near Cortachie had once been a lake, marl deposition in the Forfarshire and Borders areas of Scotland and flints found in Aberdeenshire, 16 March 1825.