At the death of Henrietta's husband, Edward Harley, in 1741, this new Harley Estate passed to his only daughter, Margaret Cavendish Harley, who in 1734 had married William Bentinck, 2nd Duke of Portland.
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He travelled to England in the service of Hans Willem Bentinck, count of Portland.
Lord Howard de Walden married Lady Lucy Cavendish-Scott-Bentinck (c. 1813 – 29 July 1899), daughter of William Cavendish-Scott-Bentinck, 4th Duke of Portland, at All Souls' Church in Marylebone on 8 November 1828.
He resumed his political activities by publishing The Constitutions of the Several Independent States of America in 1783, with a dedication to the opposition leader, the Duke of Portland.
On 11 December 1752 he married Anne Hamilton, daughter of James Hamilton, 1st Earl of Clanbrassill and his wife Henrietta Bentinck, daughter of William Bentinck, 1st Earl of Portland.
The brass chandeliers were given to the church in 1745 by the 2nd Duke of Portland in recognition of the part the town played in the defence against the Young Pretender.
In literature this troop is sometimes confused with the Dutch Regiment of Horse Guards, known as Portland's Horse after its commander William Bentinck, 1st Earl of Portland.
:The monument was mentioned in 1801 by William Bentinck, still the manuscript was first published in 1874.
Henry Egerton (died 1 April 1746) on 18 December 1720 and had issue.