Allan Ramsay's Gentle Shepherd, published 1726, is dedicated to her, in verse, by Hamilton of Bangour.
The following account of this distinguished lady is taken from Boswell's Life of Johnson by Mr.Croker:-- "Lady Margaret Dalrymple, only daughter of John, Earl of Stair, married in 1700, to Hugh, third Earl of Loudoun.

She died in 1777, aged ONE HUNDRED.

Of this venerable lady, and of the Countess of Eglintoune, whom Johnson visited next day, he thus speaks in his JOURNEY:--'Length of life is distributed impartially to very different modes of life, in very different climates; and the mountains have no greater examples of age than the Lowlands, where I was introduced to two ladies of high quality, one of whom (Lady Loudoun) in her ninety-fourth year, presided at her table with the full exercise of all her powers, and the other (Lady Eglintoun) had attained her eighty-fourth year, without any diminution of her vivacity, and little reason to accuse time of depredations on her beauty.'" ***** "Lady Eglintoune, though she was now in her eighty-fifth year, and had lived in the retirement of the country for almost half a century, was still a very agreeable woman.

She was of the noble house of Kennedy, and had all the elevation which the consciousness of such birth inspires.
Her figure was majestic, her manners high-bred, her reading extensive, and her conversation elegant.

She had been the admiration of the gay circles of life, and the patroness of poets.