Besides the works already cited, M'Lennan wrote a Life of Thomas Drummond (1867).
The caverns in the sides of the precipice are said to have afforded Wallace and other heroes (or outlaws) refuge in time of trouble, but the old house is most memorable as the home of the poet William Drummond, who here welcomed Ben Jonson; the tree beneath which the two poets sat still stands.
In 1580 Clement Little gave all his books, three hundred volumes, for the beginning of a library, and this was augmented by other valuable benefactions, one of the most interesting of which was the library of Drummond of Hawthornden.
But a few weeks before, Mr Drummond, who was Sir Robert Peel's private secretary, had been shot dead in the street by a lunatic. In consequence of this, and the manifold anxieties of the time with which he was harassed, the mind of the great statesman was no doubt in a moody and morbid condition, and when he arose to speak later in the evening, he referred in excited and agitated tones to the remark, as an incitement to violence against his person.
Among his works are The Book of Isaiah (2 vols., 1888-1890); The Book of the Twelve Prophets (2 vols., 1876-1877); Historical Geography of the Holy Land (1894); Jerusalem (2 vols., 1907); The Preaching of the Old Testament to the Age (1893); The Life of Henry Drummond (1898).