The Rt Hon Sir Harry Talbot Gibbs (1917–2005) was a Justice of the High Court from 4 August 1970 to 11 February 1981, and Chief Justice from 12 February 1981 to 5 February 1987. After graduating from the University of Queensland with a Bachelor of Arts and a Master of Laws, he was admitted to the Queensland Bar in 1939, and was appointed a Queen's Counsel (QC) in 1957. During World War II he served as a Major, including in New Guinea. Sir Harry Gibbs was a Judge of the Supreme Court of Queensland from 1961–67, and a Judge of the Federal Court of Bankruptcy and Supreme Court of the ACT 1967–70. He was appointed a Knight Commander of the Most Excellent Order of the British Empire (KBE) in 1970, a Privy Counsellor (PC) in 1972, and a Grand Cross of St Michael and St George (GCMG) in 1981.
Cassab’s portrait of Sir Harry Gibbs is fairly conventional. He is seated in full robes and wig, his arms resting along the arms of the chair. As with three of the other portraits in Court 3, he is placed against a plain background.