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In page Alexander Keith Johnston (1804–1871):

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After an education at the High School and the University of Edinburgh he was apprenticed to the Edinburgh engraver and mapmaker, James Kirkwood and William Home Lizars.[2] In 1826, he joined his brother William (who would become Sir William Johnston, Lord Provost of Edinburgh) in a printing and engraving business, forming the well-known cartographical firm of W. and A. K. Johnston[3][4] with offices based at 4 St Andrew Square in Edinburgh's New Town (demolished 2016)[5] and their printworks based at Edina Works, off Easter Road. The firm used the clan motto of "Ready Aye Ready" as their logo. Early hikes in the West Highlands had led Johnston to despair at the accuracy of maps, and inspired a deire to rectify this.[6]