Early in 1642, at the onset of the
English Civil War, Dorset joined the king at York, and pledged himself to support a troop of sixty horse. He attested to the king's declaration on 15 June 1642, that he abhorred the idea of war. In July he attended the queen in
Holland, but returned before the king's standard was raised at Nottingham. On 25 August he was sent, with Lord Southampton and
Sir John Colepeper, to treat with the parliamentary leaders. On the same date, parliamentary soldiers plundered
Knole House. He was present at the
Battle of Edgehill. He may have been in charge of the young princes as
James II wrote in 1679 that "the old Earl of Dorset at Edgehill, being commanded by the king, my father, to go and carry the prince and myself up the hill out of the battle, refused to do it, and said he would not be thought a coward for ever a king's son in Christendom". He went to Oxford with the king, and more than once protested against the continuation of the war. He made a speech at the council table against one by the Earl of Bristol and this was circulated as a tract on 18 January 1643. He was made a commissioner of the king's treasury on 7 March 1643, and was
Lord Chamberlain of the household from 21 January 1644 to 27 April 1646. Early in 1644, he was also entrusted with the privy seal and the presidency of the council. He made sensible speeches, which were printed in Oxford and London as "shewing his good affection to the Parliament and the whole state of this Kingdom". He signed the letter asking Essex to promote peace, in January 1644. He was one of the committee charged with the defence of Oxford; and was nominated by Charles in December 1645 one of those to whom he would entrust the militia. He was one of the signatories to the capitulation of Oxford on 24 June 1646. In June 1644 Dorset was assessed by the committee for the advance of money at £5,000 and his eldest son was assessed at £1,500. In 1645 he resigned an estate of £6,000, the committee undertaking to pay his debts. In September 1646 he petitioned to compound for his delinquency on the
Oxford articles, and his fine of one-tenth was fixed at £4,360. It was reduced to £2,415 on 25 March 1647, and he was discharged on 4 June 1650. Dorset was said to be one of the six peers who intended to go to Charles at
Hampton Court in October 1647 and stay with him as a council, but parliament did not permit this. After the execution of the king in 1649, Dorset is said never to have left his house in Salisbury Court,
Fleet Street. He died there, aged 62, on 17 July 1652, and was buried in the family vault at Wytham. His monument was destroyed by fire on 16 June 1663. An elegy on him was printed, with heavy black edges, by James Howell, in a rare pamphlet entitled "Ah-Ha, Tumulus Thalamus". Clarendon described Dorset as "beautiful, graceful, and vigorous: his wit pleasant, sparkling, and sublime .... The vices he had were of the age, which he was not stubborn enough to contemn or resist". He was an able speaker, and on the whole, a moderate politician, combining a strong respect for the royal prerogative with an attachment to the Protestant cause and the liberties of parliament. He was evidently an excellent man of business. ==Family==