The Scottish economic memoirs published between 1906 and 1961 cover mostly the coalfields. Ayshire in four volumes; Central in nine; Fife in three; Sanquhar, Midlothian and Stirling/Clackmannan one a piece. The other two memoirs were 'The oil-shales of the Lothians' running to three editions and the 1922 memoir on the Ayrshire bauxitic clay.