High Quality Content by WIKIPEDIA articles! Sir Arthur Haselrig, 2nd Baronet (1601 – 7 January 1661) was an English politician who sat in the House of Commons between 1640 and 1659. He was one of the five members of Parliament whom King Charles I tried to arrest in 1642, an event which led to the start of the English Civil War. He fought for the Parliamentarian cause in the Civil War and later tried to uphold the republic against Cromwell`s autocracy, Lambert`s attempt at military control and Monck`s Royalist conversion in favour of the Restoration.