*136. Judicial Powers: Impeachment and Attainder.*--The functions of a judicial character which, in the capacity of the High Court of Parliament, the two chambers fulfill are of secondary importance and do not call for extended discussion. So far as the law of the subject goes, they comprise (1) the powers possessed by each of the houses to deal with the constitution and conduct of its own membership; (2) the power of the Lords to try their own members when charged with treason or felony; (3) the jurisdiction of the Lords in the capacity of a final court of appeal for the United Kingdom; (4) the power of the two houses, acting jointly, to carry through impeachments of public officers and to enact bills of attainder; and (5) the effecting of the removal of certain kinds of public officers through the agency of an address from both houses to the crown. In days when the king and the ministers were disposed to defy the law and to evade responsibility the power of impeachment by the Commons at the bar of the Lords, originated as early as the reign of Edward III., was of the utmost importance. When, however, the House of Commons progressed in competence to the point where it was able to review and control the conduct of ministers with such thoroughness and continuity as to make it impossible for them to conduct business without a parliamentary majority, impeachment lost its value and fell into disuse. The last occasion upon which impeachment proceedings were instituted was in 1805.[189] Procedure by bill of attainder, arising from the legislative omnipotence of Parliament and following the ordinary course of legislation, is also obsolete. [Footnote 189: Anson, Law and Custom of the Constitution, I., 362-366; Moran, English Government, 327-332.]