Found in 2 Collections and/or Records:
Letter to Sir Charles Lyell from W. Blackadder regarding diluvium and post diluvium gravels in the Forfar area. He mentions that Mr Stephen has found a fine axe head near Balgavies Loch and remarks that he is glad that Lyell has got Mr Martin enlisted. November 1827.
Letter to Sir Charles Lyell from William Blackadder on geological matters. He mentions some post diluvium conglomerate found at Glamis gate, discusses the route of the river Nith from its source in the coalfields of Ayrshire to the Solway Firth and remarks that he considers the sweep of diluvium hillocks near Melgund Castle to be the most extraordinary in the country, 15 October 1827.