[2] He was an active member of the Territorial Army and served as honorary colonel of the 4th/5th Battalion of the Black Watch.

[2] Upon succeeding his father to the Earldom on 16 February 1904, he inherited large estates in Scotland and England, including Glamis Castle, St Paul's Walden Bury, Gibside Hall and Streatlam Castle in County Durham and Woolmers Park, near Hertford.

[6] Despite the Earl's reservations about royalty,[7] in April 1923, his youngest daughter, Elizabeth, married Prince Albert, Duke of York, the second son of King George V and Queen Mary.

Lord Strathmore was made a Knight Grand Cross of the Royal Victorian Order to mark the marriage.

[8] At the coronation of his daughter and son-in-law, the Earl and Countess sat in the royal box with Queen Mary and their shared granddaughters, Princesses Elizabeth and Margaret.