At these he learned of the discovery of limelight. He is sometimes mistakenly given credit for the invention of limelight at the expense of Sir Goldsworthy Gurney. Drummond died in 1840 and was buried in Mount Jerome Cemetery Dublin.
However it was Drummond who realised their value in surveying. Captain Thomas Drummond (10 October 1797 – 15 April 1840) from Edinburgh Scotland was an army officer civil engineer and senior public official. Drummond used the Drummond light which was employed in the trigonometrical survey of Great Britain and Ireland.