in 1840, Brett went to the northern circuit and became a Queen's Counsel in 1861. On the death of Richard Cobden in 1865, he unsuccessfully contested Rochdale as a Conservative, but in an 1866 by-election, he was returned for Helston in unique circumstances. He and his opponent polled exactly the same number of votes, and the mayor, as returning officer, then gave his casting vote for the Liberal candidate. As the vote was given after four o'clock, however, an appeal was lodged, and the House of Commons allowed both members to take their seats. Brett rapidly made his mark in the House, and in early 1868, he was knighted and appointed Solicitor General under Benjamin Disraeli. On behalf of the Crown, he prosecuted the Fenians charged with having caused the Clerkenwell Outrage. In Parliament, he took a leading part in the promotion of bills connected with the administration of law and justice. In August 1868, he was appointed a Justice of the Court of Common Pleas. Some of his sentences in this capacity excited much criticism, notably so in the case of the gas stokers strike, when he sentenced the defendants to imprisonment for twelve months, with hard labour, which was afterwards reduced by the Home Secretary to four months. On the reconstitution of the Court of Appeal in 1876, Brett was elevated to the rank of a Lord Justice of Appeal. He was sworn of the Privy Council at the same time. After holding the position for seven years, he succeeded Sir George Jessel as Master of the Rolls in 1883. In 1885 he was raised to the peerage as Baron Esher, of Esher in the County of Surrey. He opposed the bill proposing that an accused person or his wife might give evidence in their own case and supported the bill that empowered Lords of Appeal to sit and vote after their retirement. The Solicitors Act 1888, which increased the powers of the Incorporated Law Society, owed much to his influence. In 1880, he delivered a speech in the House of Lords, deprecating the delay and expense of trials, which he regarded as having been increased by the Judicature Act 1873. He retired from the bench at the close of 1897, and was created Viscount Esher, of Esher in the County of Surrey, a dignity never given to any judge, Lord Chancellors excepted, for mere legal conduct since the time of Lord Coke.
Compagnie Financiere du Pacifique v Peruvian Guano Co 11 QBD 55 - Established the modern test for discovery of documents.
Heaven v Pender - In the obiter dicta in his judgment of the Court of Appeal, Brett MR sought to establish a general "duty of care" between parties that would have led to a tort of negligence. Such a principle was only finally accepted by English courts in 1932.
Foakes v Beer UKHL 1, All ER Rep 106, 9 App Cas 605; 54 LJQB 130; 51 LT 833; 33 WR 233 - a leading case from the House of Lords on the legal concept of consideration
In the Arbitration between Secretary of State for Home Department and Fletcher - upholding a Queens bench decision supporting the authority of the Inspector of Mines to require the use of safety lamps; Bowen LJ dissenting.
Filburn v People's Palace and Aquarium Co Ltd was a case that imposed strict liability upon owners of wild animals for harm caused by them.
The Satanita AC 59 - Contract law case atypical of the conventional offer & acceptance pattern seen in English law. Brett's decision at appeal affirmed by the House of Lords.
Family
Lord Esher married Eugénie Mayer in 1850. Eugénie was possibly the illegitimate daughter of Napoleon Bonaparte and Fanny Meyer, though other sources suggest that her father was one Louis Mayer. They had two sons, Reginald, and Eugène, and a daughter Violet, wife of William Humble Dudley Ward and mother ofWilliam Dudley Ward. Lord Esher died in London in May 1899, aged eighty-one, and was succeeded by his eldest son, Reginald.