Fortescue was a ‘young gentleman of large possessions’ from a family of ‘very ancient lineage’.
Fortescue was appointed high sheriff of county Louth in 1839. He attended the great reform meeting in Dublin in January 1840 and signed the Leinster and Charlemont declarations in support of the Whig ministry that May.
Regarding himself as ‘a very indifferent orator’, Fortescue told electors that he hoped he might ‘learn to speak’ during his first months at Westminster.
Fortescue, regarded by some as ‘a hypocondriac’, considered himself ‘far too delicate’ to take any further part in politics. He retired at the 1841 general election in favour of a fellow Liberal, whom he nominated at the hustings.
His brother’s rising status within the Liberal ranks helped Fortescue to have the Clermont peerage revived and he was given an Irish barony in February 1852.
Fortescue nevertheless remained an influential member of the gentry in the neighbourhoods of Newry and Dundalk and became involved in the promotion of the Irish North-Western Railway.
Fortescue died after a ‘long and protracted’ illness at his seat near Newry in July 1887 and was buried in Jonesborough churchyard.
