John Caird, preacher and Principal of Glasgow University, was born to marine engineer John Caird and his wife, Janet Young, in Greenock, Scotland, on 15 December 1820. The eldest of seven sons, Caird was educated in the Greenock schools and then, at the age of fifteen, went to work for his father’s engineering firm, where he became skilled in the trade. In 1837 he convinced his father to allow him a year of study at Glasgow University, where he excelled in mathematics and logic. After the appointed year, he returned to his father’s firm and resumed his work as an engineer.