Mary, Lady Abney (née Gunston) (1676 – 12 January 1750) inherited the Manor of Stoke Newington in 1701 from her brother. The property lies about five miles north of St Paul's Cathedral in the City of London. She had a great influence on the design and landscaping of Abney Park, including the planting of the two elm walks that lead to Hackney Brook.
She is known for having sheltered Dr Isaac Watts, a Nonconformist known as the father of English hymnody for his hundreds of hymns, as a house guest for 36 years. He was inspired by her park in his writing of hymns and poems.
The Manor of Stoke Newington, a small farming community about five miles north of St Paul's Cathedral and then considered beyond the boundaries of London, had been owned and managed directly by the Cathedral until the early 17th century. After that, they granted it to a succession of private Lords of the Manor.
Mary Gunston was born in 1676 and had a brother Thomas. He became Lord of the Manor of Stoke Newington in the late 1600s.
In 1700 Mary married Thomas Abney (1640–1722), who was 36 years her senior and that year Lord Mayor of London. He had business interests in the City of London and was knighted by King William. Sir Thomas already was leasing a mansion on the Theobalds estate at Cheshunt in Hertfordshire, and that is where they started their married life. They had a family together, including three daughters.
In the custom of the time, the couple frequently invited guests to Theobalds. Their association with Isaac Watts, who became known as a hymnologist, became legendary. He was initially invited for a week to Theobalds, and became a semi-permanent member of their household, living with them for a total of 36 years.
In 1701, following the death of her brother, Thomas Gunston, Lady Mary Abney inherited the Manor of Stoke Newington. By the rights of marriage that applied at that time, the property formally passed to her husband for the duration of his life. The couple decided to live at both addresses, and split their lives between the villages of Cheshunt and their second home in Stoke Newington. Upon title passing to Lady Mary and Sir Thomas Abney, she began to complete her late brother's new manor house at Abney Park; it was later known as 'Abney House.' She had it done to suit her taste and ideas.