Ralph Briggs c. 1765-1855, “a remarkable stout and energetic man” 

A Hertford bailiff, he appears in court cases (e.g. Northern Whig 30 July 1844, 19 March 1846) and is still mobile in March 1854:

Ralph Briggs, an old man, 94 years of age, attended Lisburn market yesterday, having walked from his own house, at Causeway-end, about a mile and a quarter into town, with comparative ease. He can read ordinary print without the aid of glasses, [sic; the Whig has this comma] For more than half a century, he held a situation connected with the Hertford office in Lisburn, and when the present proprietor of the establishment visited his Irish tenantry, about nine years ago, his lordship desired that the old man should be paid his full salary during the remainder of his life, and be relieved from further attention to his former duties.

This “about nine years” is consistent with estate work up to 1845. Richard Seymour Conway became the fourth Marquess of Hertford in 1842. He visited the Irish estates in summer 1845 but otherwise kept his distance, living mostly in Paris. A favour to Ralph counts slightly against his often-cited absenteeism and disdain.

Ralph dies 7 April 1855 at Knockmore and the Banner of Ulster (see above) mentions no living relatives; we may speculate that George was related and was the source for some of the journalese, but I know of no proof.