Thomas Mytton General Thomas Mytton ( c . 1597 - 1656 ) was an officer in the Parliamentary army during the English Civil War . Life . Born about 1597 , son of Richard Mytton of Halston , Shropshire , by Margaret , daughter of Thomas Owen of Condover , Mytton matriculated at Balliol College , Oxford , on 11 May 1615 , aged 18 . He became a student of Lincoln ' s Inn in 1616 . In 1629 Mytton married Magdalen , daughter of Sir Robert Napier of Luton , Bedfordshire , and sister of the second wife of Sir Thomas Myddelton of Chirk , a connection to the parliamentary party in the heavily royalist county of Shropshire . On 10 April 1643 the parliament associated Shropshire with Warwickshire and Staffordshire under the command of Basil Feilding , 2nd Earl of Denbigh , Mytton being named as one of the committee for Shropshire . On 11 September 1643 Myddelton and Mytton together seized Wem , and established there the first parliamentary garrison in Shropshire . Mytton was made governor , and in October defeated Lord Capel ' s attempt to recapture the town . On 12 January 1644 he surprised the cavaliers at Ellesmere , capturing Sir Nicholas Byron , Sir Richard Willis , and a convoy of ammunition . On 23 June 1644 Mytton , in conjunction with Lord Denbigh , captured Oswestry , and succeeded in holding it against a royalist attempt at recapture . He was appointed governor of Oswestry , and the newspapers were full of praise . He took part in the capture of Shrewsbury ( 22 February 1645 ) , though the credit was disputed between Mytton and Lieutenant - colonel Reinking . On the passing of the self - denying ordinance Sir Thomas Myddelton was obliged to lay down his commission , and Mytton succeeded to his post as commander - in - chief of the forces of the six counties of North Wales , 12 May 1645 . He was also appointed High Sheriff of Shropshire , 30 September 1645 . From this point he is frequently described as Major - general Mytton . He took part in the defeat of Sir William Vaughan near Denbigh on 1 November 1645 , frustrating the royalist attempts to relieve Chester . Once Chester had fallen , Mytton went on to besiege the rest of the royalist garrisons in North Wales : Ruthin ( 12 April 1646 ) , Carnarvon ( 5 June 1646 ) , Beaumaris ( 14 June 1646 ) , Conwy town and castle ( 9 August , 18 November 1646 ) , Denbigh ( 26 October 1646 ) , Holt Castle ( 13 January 1647 ) , and Harlech Castle ( 15 March 1647 ) surrendered in turn to Mytton ' s forces . Parliament maintained Mytton as commander - in - chief in North Wales when the army was disbanded ( 8 April 1647 ) , and appointed him vice - admiral of North Wales in place of Glyn ( 30 December 1647 ) . He was also granted £5 , 000 out of the estates of royalist delinquents . In the Second English Civil War Mytton was again active on the parliamentary side , and recovered Anglesey from the royalists . The king ' s execution did not shake his adherence to the parliament , and in September 1651 he agreed to act as a member of the court - martial which sentenced James Stanley , 7th Earl of Derby to death . He represented Shropshire in the first Protectorate parliament convened by Oliver Cromwell in 1654 . Mytton died in London in 1656 , aged about fifty - nine , and was interred on 29 November in St . Chad ' s Church , Shrewsbury . Family . Mytton left a son , Richard , who was sheriff of Shropshire in 1686 , and a daughter , Mary , married to the royalist Sir Thomas Harris of Boreatton . Another daughter married Colonel Roger Pope , a parliamentarian . Mytton ' s only sister Sarah married the Royalist Colonel and MP Sir Edward Acton , 1st Baronet .