Drummond, Captain Thomas, civil engineer, born in Edinburgh; inventor of the Drummond Light; was employed in the trigonometrical survey of Great Britain and Ireland; became Under-Secretary for Ireland, and was held in high favour by the Irish (1797‒1840).
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Drummond, Henry * Drummond, William