her brother, who succeeded as the 13th Earl of Haddington in 1985, established himself an authority on ghosts and crop circles.
She was not bitten by the paranormal bug, however. In 1954 she married the businessman Adrian Bailey, of the Rockware Glass family, but divorced him to marry David Russell, a landowner in Berkshire, in 1965.
He was a gifted pianist who entertained her with Broadway tunes, and at the barn of their house, Combe Manor, they made a small theatre in which they staged concerts of anything from Pergolesi arias (for which they commissioned new translations) to the jazzy numbers of George Gershwin, Irving Berlin and Jerome Kern.
She was also a superb gardener, and prominent in the NSPCC. Lady Mary Russell died on the eve of Queen Elizabeth’s state funeral.
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