Sir Henry Cavendish (1732–1804), Parliamentarian in Two Countries

Sir Henry Cavendish, who sat in the Irish parliament from 1766 to 1768 and from 1776 to 1800, and in the Westminster parliament from 1768 to 1774, was a parliamentarian par excellence . His chief claim to fame is as a parliamentary diarist, in both houses of commons, noting down in shorthand some five million words. But this article is on Cavendish as a politician. He was a prolific speaker in both parliaments. But finding himself only a second‐rate debater, he cultivated two fields of expertise: finance, and, above all, parliamentary procedure. Here his knowledge soon became unequalled, and virtually unchallenged by the last two decades of the Irish parliament, where he became notorious as a master of obstruction. His political career was erratic, often in opposition, increasingly in government, a permanent officeholder by the end.