His friend Sir Walter Scott attributed Don’s ‘gay habits which rendered him averse to serious business’ to his mother’s fortune, his natural conviviality and good manners and the love of horse racing and the opera which had helped to sustain him as a French detainee at Verdun, 1803-10.
Don’s private life continued to attract attention. The rebuilding of Newton Don mansion, with its vinery, peach house, conservatory and gardens, to Robert Smirke’s design was completed in 1820, but he had to place his estates in trust to meet the cost, which prompted his heir-at-law, John Wauchope (d.1837) of Edmondstone and Niddrie, to threaten legal action. He was also implicated in the prosecution of Francis Aberdein Murray by the renegade 7th earl of Stair, whom he pursued to Paris in 1823 and challenged to a duel to secure repayment of a £2,000 debt.
We have been disturbed here by the death of poor Sir Alexander Don so suddenly as to be almost instantaneous. He had complained of his stomach and had taken an emetic as recommended by a Kelso physician, seemed better, but suddenly fell back, said I am dying and was dead immediately. His body was opened and the disease proved to be an aneurism as it is called of the heart or adherence of that organ to the ribs. Lady Don is much to be pitied.Scott Letters, x. 2-3.
An inventory sworn in Edinburgh, 18 July 1826, valued Don’s personal effects at £7,671 and was proved in Berwickshire consistory court on the 20th.
