July, 1464, a party of Yorkist men, including Sir Richard's brother John, entered the house for his arrest. Henry fled into nearby woods, but was soon captured at Brungerley Hippings (stepping stones) over the River Ribble. He was subsequently held captive in the Tower of London. The following poem has long been attributed to Henry, allegedly having been written during his imprisonment. However, a largely identical verse appears in William Baldwin's 1559 work The Mirror for Magistrates, a collection of poems written from the perspective of historical figures. Return to the throne Queen Margaret, exiled in Scotland and later in France, was determined to win back the throne on behalf of her husband and her son, Edward of Westminster. By herself, there was little she could do. However, eventually Edward IV fell out with two of his main supporters: Richard Neville, Earl of Warwick, and his own younger brother George, Duke of Clarence. At the urging of King Louis XI of France they formed a secret alliance with Margaret. After marrying his daughter Anne to Henry and Margaret's son, Warwick returned to England, forced Edward IV into exile, and restored Henry VI to the throne on 3 October 1470; the term "readeption" is still sometimes used for this event. However, by this time, years in hiding followed by years in captivity had taken their toll on Henry. Warwick and Clarence effectively ruled in his name. Henry's return to the throne lasted less than six months. Warwick soon overreached himself by declaring war on Burgundy, whose ruler Charles the Bold responded by giving Edward IV the assistance he needed to win back his throne by force. Edward returned to England in early 1471 and was reconciled with Clarence. Warwick was killed at the Battle of Barnet on 14 April and the Yorkists won a final decisive victory at the Battle of Tewkesbury on 4 May, where Henry's son Edward of Westminster was killed. Imprisonment and death Henry was imprisoned in the Tower of London again and, when the royal party arrived in London, he was reported dead. Official chronicles and documents state that the deposed king died on the night of 21 May 1471. In all likelihood, his opponents had kept him alive up to that point, rather than leave the Lancastrians with a far more formidable leader in Henry's son, Edward. However, once the last of the most prominent Lancastrian