He had horseracing interests and his racing silks were all crimson.[4] He was known in racing circles as the Father of the Turf and won the Derby with his horse Aimwell.[5] He had a country estate in Norfolk.
He married Frances Cairnes Murray, a daughter and co-heiress of Colonel John Murray, MP for County Monaghan, by whom he had an only daughter:
Louisa Fortescue.
Death, burial and succession
He died aged 85 at Brighton[7] on 29 September 1806, without male progeny, and was buried at Little Cressingham Church in Norfolk, in which parish was situated Clermont Lodge (now Clermont Hall), his shooting lodge.
As he died without male progeny his earldom of Clermont and 1770 barony of Clermont became extinct, whilst his viscountcy and 1776 barony of Clermont were inherited by his nephew William Charles Fortescue, who had been MP for County Louth and then County Louth since 1796.
Monument in St Andrew's Church, Little Cressingham
A mural monument survives in St Andrew's Church, Little Cressingham, inscribed as follows:[8]
Near this place lyeth the body of William Henry Fortescue Viscount Clermont, and Earl of Clermont in Ireland, who departed this life on the 29th day of September, 1806, in the 85th year of his age. This monument is erected in obedience to his will by his executor William Charles Fortescue, now Viscount Clermont, who was in Ireland at the time of his decease.
^Clermont, Lord (Thomas Fortescue), History of the Family of Fortescue in all its Branches, (first published 1869) 2nd edition London, 1880, p. 213 [4]