accounts of what happened next exist; of particular note is that of Grim, who was wounded in the attack. This is part of his account: Another account appears in ("Conquest of Ireland", 1189) by Gerald of Wales. After Becket's death After his death, the monks prepared Becket's body for burial. According to some accounts, it was found that Becket had worn a hairshirt under his archbishop's garments – a sign of penance. Soon after, the faithful throughout Europe began venerating Becket as a martyr, and on 21 February 1173 – little more than two years after his death – he was canonised by Pope Alexander III in St Peter's Church, Segni. In 1173, Becket's sister Mary was appointed Abbess of Barking as reparation for the murder of her brother. On 12 July 1174, amidst the Revolt of 1173–74, Henry humbled himself in public penance at Becket's tomb and at the church of St. Dunstan's, which became a most popular pilgrimage site. Becket's assassins fled north to de Morville's Knaresborough Castle for about a year. De Morville also held property in Cumbria and this too may have provided a hiding place, as the men prepared for a longer stay in the separate kingdom of Scotland. They were not arrested and Henry did not confiscate their lands, but he did not help them when they sought his advice in August 1171. Pope Alexander excommunicated all four. Seeking forgiveness, the assassins travelled to Rome, where the Pope ordered them to serve as knights in the Holy Lands for a period of 14 years. This sentence also inspired the Knights of Saint Thomas, incorporated in 1191 at Acre, and which was to be modelled on the Teutonic Knights. This was the only military order native to England (with chapters in not only Acre, but London, Kilkenny, and Nicosia), just as the Gilbertine Order was the only monastic order native to England. Henry VIII dissolved both of these during the Reformation, rather than merging them with foreign orders or nationalising them as elements of the Protestant Church of England. The monks were afraid Becket's body might be stolen, and so his remains were placed beneath the floor of the eastern crypt of the cathedral. A stone cover over it had two holes where pilgrims could insert their heads and kiss the tomb, as illustrated in the "Miracle Windows" of the Trinity Chapel. A guard chamber