Breauté, who refused to surrender it to the king. Falkes was probably hoping that if the castle held on long enough, his efforts to convince Pope Honorius III to intervene against Henry would succeed. The Archbishop excommunicated William and the siege began. The siege of Bedford Castle required huge resources. Siege engines were brought from Lincoln, Northampton and Oxfordshire, while carpenters built others on site using timber from Northamptonshire; ropes from London, Cambridge and Southampton; hides from Northampton and tallow from London. Labourers from across Bedfordshire and Northamptonshire were gathered by the relevant sheriffs, and miners from Hereford and the Forest of Dean. Crossbow bolts were ordered from a depot at Corfe Castle and from the provinces; 43,300 crossbow bolts are known to have been ordered by the king. Local trees were cut down, and stone quarrying begun to provide ammunition for siege engines. Tents and pavilions for the King were sent from London along with supplies of luxury foods and wine, also for the King. In total, Henry's wage bill for the siege came to £1,311; it is uncertain exactly how large Henry's army was, but potentially there were between 1,600 and 2,700 men present at any one time. To support the siege, Langton instructed his bishops to mobilise one man from every 24 hectares (60 acres) of land they owned and levied a special tax on the churches' estates. With these resources, Henry erected a number of siege engines around the castle; one probable trebuchet and two mangonels were set up to the east of the castle; two mangonels were placed on the west side, to attack the keep, and one mangonel on both the north and south sides. Two siege-castles were established to observe the occupants of the castle. William was confident, however, that either his brother would return and relieve the siege, or that the pope would intervene, and held on despite the artillery attacks. The losses in the royal army began to mount; chronicler Ralph of Coggeshall suggests that seven knights, and over 200 soldiers and labourers were killed as the siege dragged on. Bedford Castle finally fell through a sequence of four attacks. Royal forces first captured the barbican and then stormed the outer bailey, seizing most of the castle's supplies but taking considerable losses. Miners, operating under the protection of a "cat", then gained access to the inner bailey by collapsing part of