Lady Agnes Douglas was born at Lochleven Castle, Scotland in 1574, one of the eleven children of Sir William Douglas, 6th Earl of Morton, and Agnes Leslie. She had four brothers and six sisters. Lady Agnes and her sisters were so famed for their beauty throughout Scotland that they were known as the "pearls of Lochleven". Her paternal grandparents were Sir Robert Douglas and Margaret Erskine, a former mistress of King James V of Scotland, and her maternal grandparents were George Leslie, 4th Earl of Rothes, and Margaret Crichton, an illegitimate daughter of Princess Margaret, the youngest sister of King James III. Her half-uncle was James Stewart, Earl of Moray, Regent of Scotland, and the illegitimate son of her grandmother, Margaret from the latter's liaison with King James V. He was assassinated in 1570. Before Agnes's birth, from June 1567 until her escape in May 1568, Mary, Queen of Scots, was a prisoner at Lochleven Castle, where her father served in the capacity as custodian and her mother was the queen's closest female companion. The queen escaped from Lochleven with the aid of George Douglas, Agnes's uncle and Willy Douglas, a cousin who was resident at the castle. the only son of Agnes Douglas. He was an influential Covenanter Her father succeeded to the Earldom of Morton in 1588 as the 6th earl upon the death of his kinsman, Archibald Douglas, 5th Earl of Morton. The title had been forfeited in 1581 when James Douglas, 4th Earl of Morton, regent of Scotland was executed and attainted for his part in the murder of Henry Stewart, Lord Darnley in 1567. It was restored to the Douglas family in 1586.
Marriage and children
On 24 July 1592 at Dalkeith Palace, she married as his first wife, Archibald Campbell, 7th Earl of Argyll, the son of Colin Campbell, 6th Earl of Argyll and Agnes Keith. Agnes, who was a Roman Catholic, was instrumental in her husband's later decision to convert to the Catholic faith in 1618, eleven years after her death. Despite Agnes's religion, he commanded the royal troops which fought against the Catholic rebels led by George Gordon, 1st Marquess of Huntly in the Battle of Glenlivet on 3 October 1594. Argyll's forces were defeated by the numerically smaller forces of Huntly. The marriage produced three children:
In January 1600 she imprisoned Thomas Alexander of Balruidy in Castle Campbell, who her lawyer and John Archibald, Captain of Castle Campbell, claimed was a sheep rustler. Agnes died on 3 May 1607, a month after the birth of her only son, Archibald. She was buried at Kilmun Parish Church. Her husband married secondly on 30 November 1610, Anne Cornwallis, by whom he had three more children.
