William Retlaw Williams, The parliamentary history of the principality of Wales, from the earliest times to the present day, 1541-1895 (1895), p. 143 (snippet 1), (snippet 2): "Richard Herbert of Montgomery. Eldest son of the member 1601, whom he succ. as 2nd Lord Herbert of Chirbury 6 Aug. 1648, b. about 1600, m. Lady Mary Egerton dau. of John Earl of Bridgwater, sat for co. Montgomery March to May 1640, and for Montgomery Oct. 1640 until disabled 12 Sept. 1642 for putting the Commission of Array in execution in Salop, and joining the King at Oxford, was cr. MA Oxford 1643, raised at his own charges a regiment of foot and a troop of horse, and bore the rank of Col. was Gov. of Bridgnorth 1642, Ludlow 1643, Aberystwith 1644, and Newport 1645 but took the Negative Oath, petitioned to compound 6 March 1647, and fined £1,000. d. 13 May 1655 and was bur. at Montgomery. He was Chief Forester of Snowdon... like his father."
Eliot Warburton, Memoirs of Prince Rupert, and the cavaliers: Including their private correspondence, now first published from the original manuscripts (1849), p. 237
