In or before 1856 [her father] Reverend Frederick Fitzpatrick and [her mother] Olivia Taylour were married. She the daughter of [her grandfather] Thomas Taylour 2nd Marquess of Headfort (age 68) and [her grandmother] Olivia Stevenson.
In 1856 Mary "Patsy" Fitzpatrick was born to [her father] Reverend Frederick Fitzpatrick and [her mother] Olivia Taylour.
Around 1872 [her mother] Olivia Taylour unsuccessfully attempted, allegedly, to become the mistress of Prince Albert Saxe Coburg Gotha. Around the same time her daughter Mary "Patsy" Fitzpatrick (age 16), aged sixteen, became the mistress of his son King Edward VII of the United Kingdom (age 30). She, Patsy, was married off to [her husband] William Cornwallis-West (age 36).
In 1872 William Cornwallis-West (age 36) and Mary "Patsy" Fitzpatrick (age 16) were married. He was more than twice her age - the marriage arranged to avoid a scandal. They lived at Ruthin Castle [Map]. The difference in their ages was 20 years.
On 28th June 1873 [her daughter] Mary Theresa "Daisy" Cornwallis-West was born to [her husband] William Cornwallis-West (age 38) and Mary "Patsy" Fitzpatrick (age 17) at Ruthin Castle [Map].
On 14th November 1874 [her son] George Frederick Myddelton Cornwallis-West was born to [her husband] William Cornwallis-West (age 39) and Mary "Patsy" Fitzpatrick (age 18).
On 16th May 1875 [her daughter] Constance Edwina "Shelagh" Cornwallis-West Duchess Westminster was born to [her husband] William Cornwallis-West (age 40) and Mary "Patsy" Fitzpatrick (age 19). She married (1) 16th February 1901 Hugh "Bendor" Grosvenor 2nd Duke Westminster and had issue (2) 14th January 1920 John Fitzpatrick Lewis.
1877. Bassano Ltd. Photograph of Mary "Patsy" Fitzpatrick (age 21).
William of Worcester's Chronicle of England
William of Worcester, born around 1415, and died around 1482 was secretary to John Fastolf, the renowned soldier of the Hundred Years War, during which time he collected documents, letters, and wrote a record of events. Following their return to England in 1440 William was witness to major events. Twice in his chronicle he uses the first person: 1. when writing about the murder of Thomas, 7th Baron Scales, in 1460, he writes '… and I saw him lying naked in the cemetery near the porch of the church of St. Mary Overie in Southwark …' and 2. describing King Edward IV's entry into London in 1461 he writes '… proclaimed that all the people themselves were to recognize and acknowledge Edward as king. I was present and heard this, and immediately went down with them into the city'. William’s Chronicle is rich in detail. It is the source of much information about the Wars of the Roses, including the term 'Diabolical Marriage' to describe the marriage of Queen Elizabeth Woodville’s brother John’s marriage to Katherine, Dowager Duchess of Norfolk, he aged twenty, she sixty-five or more, and the story about a paper crown being placed in mockery on the severed head of Richard, 3rd Duke of York.
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1898. Studio of Joseph John Elliott (age 62) and Fry. Photograph of Mary "Patsy" Fitzpatrick (age 42).
On 16th February 1901 [her son-in-law] Hugh "Bendor" Grosvenor 2nd Duke Westminster (age 21) and [her daughter] Constance Edwina "Shelagh" Cornwallis-West Duchess Westminster (age 25) were married. She by marriage Duchess Westminster.
On 4th September 1916 [her mother] Olivia Taylour died.
On 4th July 1917 [her husband] William Cornwallis-West (age 82) died.
On 19th December 1919 [her son-in-law] Hugh "Bendor" Grosvenor 2nd Duke Westminster (age 40) and [her daughter] Constance Edwina "Shelagh" Cornwallis-West Duchess Westminster (age 44) were divorced on the grounds of his adultery and desertion, with the decree being made absolute 19 December 1919. The alimony settlement of £13,000 a year he made upon her, which she declined, was then the largest in British legal history.
On 14th January 1920, just over three weeks after her divorce from [her son-in-law] Hugh "Bendor" Grosvenor 2nd Duke Westminster (age 40), [her son-in-law] John Fitzpatrick Lewis and [her daughter] Constance Edwina "Shelagh" Cornwallis-West Duchess Westminster (age 44) were married.
On 21st July 1920 Mary "Patsy" Fitzpatrick (age 64) died.
Kings Wessex: Great x 26 Grand Daughter of King Edmund "Ironside" I of England
Kings Gwynedd: Great x 21 Grand Daughter of Owain "Great" King Gwynedd
Kings Seisyllwg: Great x 27 Grand Daughter of Hywel "Dda aka Good" King Seisyllwg King Deheubarth
Kings Powys: Great x 22 Grand Daughter of Maredudd ap Bleddyn King Powys
Kings Godwinson: Great x 27 Grand Daughter of King Harold II of England
Kings England: Great x 17 Grand Daughter of King Edward III of England
Kings Scotland: Great x 25 Grand Daughter of King Duncan I of Scotland
Kings Franks: Great x 22 Grand Daughter of Louis VII King of the Franks
Kings France: Great x 25 Grand Daughter of Robert "Pious" II King of the Franks
Kings Duke Aquitaine: Great x 30 Grand Daughter of Ranulf I Duke Aquitaine
Father: Reverend Frederick Fitzpatrick
Mary "Patsy" Fitzpatrick 17 x Great Grand Daughter of King Edward III of England
Great x 2 Grandfather: Thomas Taylour 1st Earl of Bective
Great x 1 Grandfather: Thomas Taylour 1st Marquess of Headfort
Great x 3 Grandfather: Hercules Langford Rowley Viscount Langford
Great x 2 Grandmother: Jane Rowley
Great x 3 Grandmother: Elizabeth Rowley 1st Viscountess Langford
GrandFather: Thomas Taylour 2nd Marquess of Headfort 15 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Valentine Quin
Great x 2 Grandfather: George Quin
Great x 1 Grandmother: Mary Quin Marchioness of Headfort 14 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: William Cavendish of Doveridge Hall 
11 x Great Grand Son of King Edward III of England
Great x 3 Grandfather: Henry Cavendish 1st Baronet 12 x Great Grand Son of King Edward III of England
Great x 2 Grandmother: Caroline Cavendish 13 x Great Grand Daughter of King Edward III of England
Great x 4 Grandfather: Henry Pyne
Great x 3 Grandmother: Anne Pyne 13 x Great Grand Daughter of King Edward I of England
Great x 4 Grandmother: Anne Edgecumbe 12 x Great Grand Daughter of King Edward I of England
Mother: Olivia Taylour 16 x Great Grand Daughter of King Edward III of England
Great x 1 Grandfather: John Stevenson of Dublin
GrandMother: Olivia Stevenson