Henrici Quinti, Angliæ Regis, Gesta, is a first-hand account of the Agincourt Campaign, and subsequent events to his death in 1422. The author of the first part was a Chaplain in King Henry's retinue who was present from King Henry's departure at Southampton in 1415, at the siege of Harfleur, the battle of Agincourt, and the celebrations on King Henry's return to London. The second part, by another writer, relates the events that took place including the negotiations at Troye, Henry's marriage and his death in 1422.
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Diary of Isabella Twysden: Introduction. 3rd August 1563. Sir Roger's [her future mother-in-law] mother liked to be attended by a young lady in waiting, and Isabella Saunder was performing this function in 1633, possibly because her [her father] father had ruined himself over the New River, Isabella inherited the heraldic achievements of the Saunder family, as her only brother died unmarried, but was heir to nothing else.
Diary of Isabella Twysden: Introduction. The Diary Of Isabella, Wife Of Sir [her future husband] Roger Twysden, Baronet, Of Royden Hall, East Peckham, 1645-1651.
3rd August 1563. By The Rev. F. W. Bennitt, M.A.
Before 1583 [her father] Nicholas Saunders of Nonsuch and Ewell in Surrey (age 19) and [her step-mother] Elizabeth Blount (age 17) were married.
In 1605 Isabella Saunders was born to [her father] Nicholas Saunders of Nonsuch and Ewell in Surrey (age 42).
On 8th January 1628 William Twysden 1st Baronet (age 62) died. His son [her future husband] Roger (age 30) succeeded 2nd Baronet Twysden of Roydon in Kent.
In 1635 Roger Twysden 2nd Baronet (age 37) and Isabella Saunders (age 30) were married.
On 11th December 1635 [her son] William Twysden 3rd Baronet was born to [her husband] Roger Twysden 2nd Baronet (age 38) and Isabella Saunders (age 30).
On 7th November 1640 [her daughter] Frances Twysden was born to [her husband] Roger Twysden 2nd Baronet (age 43) and Isabella Saunders (age 35). She married in or before 1664 Peter Killigrew 2nd Baronet and had issue.
On 9th February 1649 [her father] Nicholas Saunders of Nonsuch and Ewell in Surrey (age 86) died.
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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In 1657 Isabella Saunders (age 52) died. She was buried at St Michael's Church East Peckham.
On 27th June 1672 [her former husband] Roger Twysden 2nd Baronet (age 74) died. His son [her son] William (age 36) succeeded 3rd Baronet Twysden of Roydon in Kent.
Diary of Isabella Twysden: Introduction. This Diary of Lady Twysden's is in the British Museum, Additional Manuscripts numbered 34169; it was sold at Sotheby's to the Museum in 1892.
Isabella was the third and youngest daughter of Sir [her father] Nicholas Saunder of Nonsuch, near Swell in Surrey. Born in 1605, she married in 1635 and died in 1657. Sir Roger was thirty-seven at the time of his marriage.
Kings Wessex: Great x 17 Grand Daughter of King Edmund "Ironside" I of England
Kings Gwynedd: Great x 14 Grand Daughter of Owain "Great" King Gwynedd
Kings Seisyllwg: Great x 20 Grand Daughter of Hywel "Dda aka Good" King Seisyllwg King Deheubarth
Kings Powys: Great x 15 Grand Daughter of Maredudd ap Bleddyn King Powys
Kings Godwinson: Great x 17 Grand Daughter of King Harold II of England
Kings England: Great x 7 Grand Daughter of King Edward III of England
Kings Scotland: Great x 16 Grand Daughter of King Duncan I of Scotland
Kings Franks: Great x 13 Grand Daughter of Louis VII King of the Franks
Kings France: Great x 17 Grand Daughter of Robert "Pious" II King of the Franks
Kings Duke Aquitaine: Great x 21 Grand Daughter of Ranulf I Duke Aquitaine
Great x 2 Grandfather: Henry Saunders
Great x 1 Grandfather: William Saunders
GrandFather: Nicholas Saunders of Ewell in Surrey
Father: Nicholas Saunders of Nonsuch and Ewell in Surrey 6 x Great Grand Son of
Great x 4 Grandfather: Nicholas Carew 
Great x 3 Grandfather: James Carew 3 x Great Grand Son of
Great x 4 Grandmother: Margaret Fiennes 
2 x Great Grand Daughter of
Great x 2 Grandfather: Richard Carew 4 x Great Grand Son of
Great x 4 Grandfather: Thomas Hoo 1st Baron Hoo and Hastings 9 x Great Grand Son of
Great x 3 Grandmother: Eleanor Hoo 6 x Great Grand Daughter of
Great x 4 Grandmother: Eleanor Welles Baroness Hoo and Hastings 
5 x Great Grand Daughter of
Great x 1 Grandfather: Nicholas Carew of Beddington in Surrey 5 x Great Grand Son of
Great x 3 Grandfather: Robert Oxenbridge
Great x 2 Grandmother: Malyn Oxenbridge
GrandMother: Isabel Carew 5 x Great Grand Daughter of
Great x 3 Grandfather: Thomas Bryan
Great x 2 Grandfather: Thomas Bryan
Great x 1 Grandmother: Elizabeth Bryan 4 x Great Grand Daughter of
Great x 4 Grandfather: John Bourchier 1st Baron Berners 
Great Grand Son of
Great x 3 Grandfather: Humphrey Bourchier 2 x Great Grand Son of
Great x 4 Grandmother: Margery Berners Baroness Berners
Great x 2 Grandmother: Margaret Bourchier 1st Baroness Bryan 3 x Great Grand Daughter of
Great x 4 Grandfather: Frederick Tilney 
Great x 3 Grandmother: Elizabeth Tilney Countess of Surrey 8 x Great Grand Daughter of
Great x 4 Grandmother: Elizabeth Cheney 7 x Great Grand Daughter of
Isabella Saunders 7 x Great Grand Daughter of