Saunderson’s father Francis, whose great-great-grandfather Robert Sanderson (as the name was then spelt) had sat for the same county about a century earlier, was Member for Cavan at Dublin and London from 1788 to 1806, when he withdrew after falling out with the Maxwells, whose dominant interest was headed by Lord Farnham.
He duly offered in place of the anti-Catholic Nathaniel Sneyd at the general election of 1826, when he at first courted the independent interest. But, amid allegations that he had bartered his suspected views for a seat, he united with Maxwell on a staunchly anti-Catholic ticket, which secured him the votes of many hitherto sceptical country gentlemen. The target of a vitriolic Catholic campaign, he was shouted down on nomination day, when his father walked out of the hall in disgust, and, having received a blow on the head from a stone during the week-long poll, was too overcome by emotion and exhaustion to speak on being declared elected in second place behind Maxwell.
Saunderson succeeded to the family estates on the death of his senile father that year and early in 1828 he married Maxwell’s sternly pious sister Sarah, whose father was an absentee clergyman.
Saunderson took a month’s leave to attend the assizes, 8 Mar. 1830. He voted against Jewish emancipation, 17 May, the Galway franchise bill, 25 May, and (unless this was Richard Sanderson, Member for Colchester) reduction of the grant for South American missions, 7 June. Assured of government support, he was again returned at the general election that summer, when, despite having ‘ratted’, he was backed by those Protestant gentlemen who valued him above the interloper Sir William Young, and by the liberal electors, whose candidates withdrew before the contest.
A conscientious landlord, Saunderson shut up the Castle and remitted his tenants’ rents during the Famine, declaring in March 1847 that ‘I feel as part of a crew of a sinking ship’. By that time, devastated by the death of his eldest son Francis and incapacitated by the loss of a leg, which had to be amputated after a riding accident, he moved abroad and lived as a recluse.
