Norman Robertson was born on the 9th January 1876 to William and Mary Elizabeth Robertson. He arrived at Westminster in 1888 where his elder brother, William Alexander, was in his final year. Their younger brother Laurence Grant joined him in 1891. The three Robertson boys were all members of Homeboarders’ House.

It is uncertain what Norman went on to do immediately after leaving the school in 1894. However, on the outbreak of the First World War, he joined the Inns of Court Officer Training Corps.

On the 20th February 1917, he became a Captain in the 2nd Battalion Royal Hampshire Regiment. During the second Battle of Arras on the 23rd April, Norman was taken prisoner near Monchy-le-Preux. He died two months later, at the age of 40, in a German military hospital at Hanover on 20th June 1917.

His eldest brother, William Alexander was the only one to survive the war; Laurence Grant had already been killed in action during the Battle of the Somme in 1916. In memory of his two brothers, William left a bequest to the National Trust, which enabled the purchase of Sutton House – a Tudor house in Hackney. William also commemorated his two brothers on the Robertson’s Corner memorial on the Dunstable Downs in Bedfordshire.