In late 1810, the King's mental health once again broke down, following the death of his youngest daughter, Princess Amelia. Parliament agreed to follow the precedent of 1788; without the King's consent, the Lord Chancellor affixed the Great Seal of the Realm to letters patent naming Lords Commissioners. The letters patent lacked the Royal Sign Manual, but were sealed by request of resolutions passed by both Houses of Parliament. The Lords Commissioners appointed by the letters patent, in the name of the King, then signified the granting of Royal Assent to a bill that became the Regency Act 1811. Parliament restricted some of the powers of the Prince Regent (as the Prince of Wales became known). The constraints expired one year after the passage of the Act. The Prince of Wales became Prince Regent on 5 February 1811.