The local Indexes show various references to House of Lords related material in the Laing Collection (check the Indexes for more details): A collection of all the protestations entered in the journals of the House of Lords, 1641-1732, at La.III.677; and, a letter of H. Collen to an unnamed correspondent about a scheme for warming and ventilating the House of Lords, 1847, at La.II.426/114. There is also a reference to the House of Commons (check the Indexes for more details): the affairs of the House, discussed in letters from W. C. Foster to T. Townshend, 1830, at Gen. 835/14, nos. 2-5.
In addition, the UK National Register of Archives (NRA), updated by the Historical Manuscripts Commission, notes for the House of Lords: letters, state and miscellaneous papers, 17th century-18th century, House of Lords Record Office, The Parliamentary Archives, Ref. Braye papers NRA 7116, and draft journal, 1641-1642, Ref. Braye papers addnl, and 160 deeds of appointment of proxies, 1767-1816, NRA 717 Lords proxies; volume of peers' proxies, 1768-1821, Keele University Library, Ref. 6/8 NRA 1085 Richards; and, secret committee minutes, 1793, 1797-98, Hampshire Record Office, Ref. 21M57 NRA 8798 Agar. For the House of Commons: letters, state and miscellaneous papers, 17th century-18th century, House of Lords Record Office, The Parliamentary Archives, Ref. Braye papers NRA 7116; and, House of Commons Diaries, 1593, 1601, Ref. Braye papers addnl.