Only twenty years after Lanfranc, Anselm, greatly daring, pulled down most of his choir, and with his prior, Ernulf, began a slightly wider and much longer choir, extending about as far as the present Holy Table. This came to be known as "the glorious choir of Conrad", from the name of the prior who completed it. Anselm's or Ernulf's work still remains as part of the present crypt. In 1174, a hundred years later, the year of Henry II's penance at Becket's tomb, the whole church was ruined by the most devastating fire in its annals. How severe was the blow, both to monks and people, we may learn from Gervase, who was an eyewitness and one of the fraternity. The people "tore their hair and beat the walls and pavement of the church with their heads and hands, blaspheming the Lord and his Saints"; the monks "wailed and howled rather than sang their daily and nightly services" in the roofless nave. French William, the designer of the Cathedral at Sens in Normandy, was chosen for the restoration; and the mark of his handiwork is plainly to be seen in the resemblances between the two churches. Genius transforms hindrances into triumphs. French William's difficulty was that the side chapels of St. Andrew and St. Anselm, built on the arc of the old apse, were too near together to admit of the full width of his new and longer choir. He kept the chapels, contracted the choir at their nearest points and then expanded it into the Trinity Chapel, with the remarkable effect which strikes every observer. When his work was partly accomplished, and he was on the scaffolding to prepare for the turning of the vault, he fell with a mass of timber and stone from a height of 50 feet, and was disabled for life. He chose for his successor another man of genius, known as English William, one of his staff, "small of body, but in many kinds of workmanship acute and honest", who added to his master's design the great uplift of the floor of the Trinity Chapel and completed that and the Corona or Becket's Crown. Since 1185 no substantial alteration has been made in the eastern half of the Cathedral. If the reader desires to know the chief sources of our information about the early history of Canterbury Cathedral, the reply is in itself a picture of the times. Eadmer was a boy in the convent school before the Conquest, and singer or precentor in Lanfranc's choir of monks. He also lived through the rule of Anselm. Gervase was a monk of Christ Church when Becket died in the Martyrdom. He witnessed the fire of 1174, the desolation it left behind, and the immortal achievements of French William and of his English namesake. Eadmer and Gervase have both left us narratives, not umixed with monkish legend, but faithful and full of curious information.