On 06 Jul 1833 [his father] Albert Denison 1st Baron Londesborough (age 27) and [his mother] Henrietta Maria Weld-Forester Baroness Londesborough were married. He the son of [his grandfather] Henry Conyngham 1st Marquess Conyngham and [his grandmother] Elizabeth Denison Marchioness Conyngham (age 64).

On 19 Jun 1834 William Henry Forester Denison 1st Earl Londesborough was born to Albert Denison 1st Baron Londesborough (age 28) and Henrietta Maria Weld-Forester Baroness Londesborough.

On 22 Apr 1841 [his mother] Henrietta Maria Weld-Forester Baroness Londesborough died.

On 21 Dec 1847 [his father] Albert Denison 1st Baron Londesborough (age 42) and [his step-mother] Ursula Lucy Grace Bridgeman (age 24) were married. He the son of [his grandfather] Henry Conyngham 1st Marquess Conyngham and [his grandmother] Elizabeth Denison Marchioness Conyngham (age 78).

On 15 Jan 1860 [his father] Albert Denison 1st Baron Londesborough (age 54) died. His son William Henry Forester Denison 1st Earl Londesborough (age 25) succeeded 2nd Baron Londesborough of Londesborough in the East Riding of Yorkshire.

In 1863 William Henry Forester Denison 1st Earl Londesborough (age 28) and Edith Somerset Countess Londesborough (age 24) were married. She by marriage Baroness Londesborough of Londesborough in the East Riding of Yorkshire. She the daughter of Henry Somerset 7th Duke Beaufort and Emily Frances Smith Duchess Beaufort (age 62). They were third cousins.

On 19 Jun 1864 [his son] William Henry Francis Denison 2nd Earl Londesborough was born to William Henry Forester Denison 1st Earl Londesborough (age 30) and [his wife] Edith Somerset Countess Londesborough (age 26).

After 1865 [his daughter] Edith Henrietta Sybil Denison Lady Codrington was born to William Henry Forester Denison 1st Earl Londesborough (age 30) and [his wife] Edith Somerset Countess Londesborough (age 26).

On 18 Feb 1866 Thomas Hay-Drummond 11th Earl Kinnoull (age 80) died. His son George Hay-Drummond 12th Earl Kinnoull (age 38) succeeded 12th Earl Kinnoull, 5th Baron Hay of Pedwardine in Herefordshire. [his sister-in-law] Emily Blanche Charlotte Somerset Countess Kinnoul (age 38) by marriage Countess Kinnoull.

On 11 Aug 1867 [his daughter] Lilian Katharine Selina Denison was born to William Henry Forester Denison 1st Earl Londesborough (age 33) and [his wife] Edith Somerset Countess Londesborough (age 29).

In or after 1868 [his daughter] Mildred Adelaide Cecilia Denison was born to William Henry Forester Denison 1st Earl Londesborough (age 33) and [his wife] Edith Somerset Countess Londesborough (age 29).

In or after 1868 [his daughter] Ida Emily Augusta Denison Lady Sitwell was born to William Henry Forester Denison 1st Earl Londesborough (age 33) and [his wife] Edith Somerset Countess Londesborough (age 29).

In 1886 [his son-in-law] George Reresby Sitwell 4th Baronet (age 25) and [his daughter] Ida Emily Augusta Denison Lady Sitwell (age 17) were married. She by marriage Lady Sitwell of Renishaw Hall in Derbyshire. She the daughter of William Henry Forester Denison 1st Earl Londesborough (age 51) and [his wife] Edith Somerset Countess Londesborough (age 47).

In 1887 William Henry Forester Denison 1st Earl Londesborough (age 52) was created 1st Earl Londesborough in Yorkshire. [his wife] Edith Somerset Countess Londesborough (age 48) by marriage Countess Londesborough in Yorkshire.

On 03 Feb 1887 [his son-in-law] Gerald William Henry Codrington 1st Baronet (age 37) and [his daughter] Edith Henrietta Sybil Denison Lady Codrington (age 22) were married. She by marriage Lady Codrington of Dodington. She the daughter of William Henry Forester Denison 1st Earl Londesborough (age 52) and [his wife] Edith Somerset Countess Londesborough (age 48). They were half first cousins. He a great x 5 grandson of King Charles II of England Scotland and Ireland.

On 11 Aug 1887 [his son] William Henry Francis Denison 2nd Earl Londesborough (age 23) and [his daughter-in-law] Grace Adelaide Fane Countess Londesborough (age 26) were married. She the daughter of Francis William Henry Fane 12th Earl of Westmoreland (age 61) and Adelaide Ida Curzon Howe Countess of Westmoreland (age 52). He the son of William Henry Forester Denison 1st Earl Londesborough (age 53) and [his wife] Edith Somerset Countess Londesborough (age 49). They were third cousins.

In 1892 Henry Chaplin 1st Viscount Chaplin (age 51) sold the heavily mortgaged Blankney, Lincolnshire to the principal mortgagee William Henry Forester Denison 1st Earl Londesborough (age 57).

In 1895 [his sister-in-law] Emily Blanche Charlotte Somerset Countess Kinnoul (age 67) died.

In 1899 [his brother-in-law] Henry Charles Fitzroy Somerset 8th Duke Beaufort (age 75) died at Badminton House. He was buried at St Michael and all Angels Church, Badminton. His son Henry Adelbert Wellington Fitzroy 9th Duke Beaufort (age 51) succeeded 9th Duke Beaufort, 11th Marquess Worcester, 15th Earl Worcester, 17th Baron Herbert of Raglan, 9th Baron Botetort. Louise Emily Harford 9th Duchess Beaufort (age 34) by marriage Duchess Beaufort.

On 19 Apr 1900 William Henry Forester Denison 1st Earl Londesborough (age 65) died. His son [his son] William Henry Francis Denison 2nd Earl Londesborough (age 35) succeeded 2nd Earl Londesborough in Yorkshire, 3rd Baron Londesborough of Londesborough in the East Riding of Yorkshire. [his daughter-in-law] Grace Adelaide Fane Countess Londesborough (age 39) by marriage Countess Londesborough in Yorkshire.

On 15 May 1915 [his former wife] Edith Somerset Countess Londesborough (age 76) died.