In 1834 O’Loghlen had the distinction of being the first Catholic law officer to be appointed since the reign of James II. As a talented young lawyer on the Munster circuit, his clear and powerful advocacy and mastery of legal procedure earned him an immense income. Richard Lalor Shiel provided a vivid sketch of his physical appearance at this period,
His figure was light – his stature low, but his form compact, and symmetrically put together. His complexion was fresh and healthy, and intimated a wise acquaintance with the morning sun, more than a familiarity with the less salubrious glimmerings of the midnight lamp. His hair was of sanded hue, like that of his Danish forefathers … . His head is large, and, from the breadth and altitude of the forehead, denotes a more than ordinary quantity of that valuable pulp, with the abundance of which the intellectual power is said to be in measure. His large eyes of deep blue, although not enlightened by the flashings of constitutional vivacity, carry a more professional expression, and bespeak caution, sagacity, and slyness, while his mouth exhibits a steadfast kindliness of nature, and a tranquillity of temper, mixed with some love of ridicule, and, although perfectly free from malevolence, a lurking tendency to derision.
Though not prominent as an agitator, O’Loghlen actively participated in the campaign for Catholic emancipation, of which he became a beneficiary when appointed a king’s counsel in 1830.
O’Loghlen was a close friend of Daniel O’Connell, for whom he had served as junior counsel from 1815, before succeeding to a large part of his practice. O’Connell once remarked of his protégé, ‘He is the best and most excellent creature. I love him as my son and would trust him exactly in the same way’. Nevertheless, O’Connell had reason to doubt O’Loghlen’s commitment to repeal, and it was said that once in parliament the latter displayed greater support for temperance than for repeal.
As a liberal ‘in its most extended sense’, O’Loghlen attracted the support of both the duke of Devonshire and the repealers when he next stood for parliament at Dungarvan in 1835.
We have for the first time in near two centuries a Catholic Attorney-General who, besides, is one of the most honest and straightforward persons living. His ears will be open to the complaints of the Catholic Clergy as well as of the Catholic laity upon every act of oppression and tyranny practiced against the poorest of the people. Every care will be taken to give the Commission of the Peace to every liberal man qualified for it. The Attorney-General will not allow jurors to be packed against the people. And if the Orangemen of police commit any more murders, they will be prosecuted seriously and, if possible, effectually.
Indeed, in March 1835, O’Loghlen had sat on the select committee to investigate the nature and extent of Orange societies in Ireland.
O’Loghlen consistently supported liberal measures such as Irish church reform, and was widely admired ‘for his great readiness as a debater, and his sound sense and practical experience’.
O’Loghlen played a pivotal role in marshalling statistics in support of the ill-fated Irish municipal corporations bill of 1836, which passed the Commons only after O’Loghlen, despite O’Connell’s protests, agreed to place the appointment of sheriffs in the lord lieutenant’s hands.
In November 1836, O’Loghlen, again with the enthusiastic endorsement of O’Connell, was appointed a baron of the Irish court of exchequer and vacated his seat. The following January he became master of the rolls, where he ‘proved one of the best judges that ever sat on the Irish bench’.
