John McMurdo was chamberlain to the Duke of Queensberry in Drumlanrig Castle. Robert Burns is said to have inscribed this verse on a window pane of his friend McMurdo’s house.
“Blest be M'Murdo to his latest day!No envious cloud o'ercast his evening ray;No wrinkle, furrow'd by the hand of care,Nor ever sorrow add one silver hair!O may no son the father's honour stain,Nor ever daughter give the mother pain!”