 When the new Parliament met in 1769, Mervyn Pratt, the defeated candidate, petitioned against the election of Montgomery on grounds of bribery, corruption and undue influence.This petition was not finally determined owing to the premature prorogation of Parliament in December 1769, so Montgomery survived and continued to represent the county until his death.He had previously stood as a candidate for Cavan in the 1761 general election but was defeated.