Mary Speir Gunn was murdered in a shooting attack at the isolated Northbank Cottage near Portencross in North Ayrshire, Scotland on the evening of Saturday, 18 October 1913. Six shots were fired through the living-room window at night. Three shots struck Mary Gunn, the fatal one piercing her heart. Two shots hit her sister Jessie McLaren, who collapsed with a bullet lodged in her back, but she survived the attack. Jessie's husband, Alexander McLaren, was injured in the index finger of his left hand.