The left wing consisted of horse under Sir Henry Wilmot, with Lord Digby, the King's Secretary of State, in support and Colonel Arthur Aston's dragoons on his flank.
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Sir Thomas obviously conducted himself satisfactorily in the campaign culminating in the Battle of Edgehill because an order from Prince Rupert in January 1643 refers to him as a colonel of a regiment of cuirassiers, and two days later on 19 January the King announced that he was sending Aston as a Major-General to Cheshire and Lancashire.