In 1813, Governor
Simon Snyder appointed Gibson as judge of the trial-level
Court of Common Pleas of the new Eleventh judicial district, which included
Tioga,
Bradford,
Susquehanna, and
Luzerne counties. Gibson took up his residence at
Wilkes-Barre, where he first held court in a log-house.
Pennsylvania Supreme Court service On June 27, 1816, he was appointed by Governor
Simon Snyder as an associate-justice of the Supreme Court, to fill the place vacated by the death of his friend,
Hugh Brackenridge. He joined Chief Justice
William Tilghman and Justice
Jasper Yeates. Placed, at the age of thirty-six, in so responsible and dignified a position, and brought into close contact with the wide learning and experience of these veteran justices, Gibson quickly realized his deficiencies. He studied laboriously during the first years of his service on the supreme bench, and became engrossed in the law. He acquired a vast and accurate knowledge which gave him, as the years passed, a sureness and mastery, rarely equaled by any judge, in dealing with all questions presented. Gibson's first opinion on the supreme court was a concurrence that the Pennsylvania-born child of a fugitive slave from Maryland was free, and that neither she nor her mother could be returned to the mother's former enslaver. (
Commonwealth (ex rel. Eliza) v. Holloway, 2 Serg. & Rawl. 305, 308 (Pa. 1816)). In 1817, on the death of Justice Yeates, Thomas Duncan was appointed to the vacancy, largely, it is supposed, through the influence of Gibson. He served with his preceptor on the bench as his junior associate. Gibson was promoted to Chief Justice in 1827. A constitutional amendment in 1838 changed the tenure of office of the Supreme Court justices from life to a term of fifteen years. It provided that the commissions of the justices then in office should expire at intervals of three years, in the order of their seniority as of January 1, 1839. Justice Gibson had opposed this change on broad grounds of public policy. At the suggestion of his associates, he resigned and was reappointed by Governor
Joseph Ritner in 1838, thus prolonging his term by several years. This action was criticized by the newspapers. An 1850 state constitutional amendment provided that the justices of the Supreme Court should be elected instead of being appointed by the governor. At the
Democratic Party convention in 1851, the only member of the existing court who was placed upon the ticket was Chief Justice Gibson. "The nomination," says Judge Porter, "was an act of high homage to his character. It was the result of that feeling. He was more than seventy years of age, too old, if he had been willing, to accomplish by his own energy anything to promote his nomination, and as unacquainted as a child with partisan politics and with party leaders. In one sense, the nomination was a rebuke to himself. He had seldom lost an opportunity to express his want of confidence in popular action, and his disapprobation of every movement designed to enlarge the boundaries of popular power. He took as little pains to conceal his sentiments on this point as on all others, and while he expressed them decorously he uttered them boldly. It must, therefore, have cost him some surprise, if not compunction, to find that carrying into effect the very movement of which he had most horror, the people, through their representatives, chose to retain their hold of him as one of their most important public servants." The justices drew lots for the terms, the law providing that one of them should go out of office every three years. Jeremiah Black drew the shortest term, and with it the office of chief justice. Gibson was commissioned as associate in the court where he had sat as chief justice for twenty-four years.
Honors Gibson received an
honorary LL.D. from the
University of Pennsylvania in 1838, and another from
Harvard University in 1847. Gibson was posthumously honored by inclusion of his name on a
mosaic in the
Thomas Jefferson Building of the
Library of Congress in
Washington, D.C., along with nine other highly-distinguished American lawyers and judges (see picture in gallery, below). ==Death and memorial==