He solicited the help of the prisoner in the adjacent cell, Father Balbi, a renegade priest. The spike, carried to the new cell inside the armchair, was passed to the priest in a folio Bible carried under a heaping plate of pasta by the hoodwinked jailer. The priest made a hole in his ceiling, climbed across and made a hole in the ceiling of Casanova's cell. To neutralize his new cellmate, who was a spy, Casanova played on his superstitions and terrorized him into silence. When Balbi broke through to Casanova's cell, Casanova lifted himself through the ceiling, leaving behind a note that quoted the 117th Psalm (Vulgate): "I shall not die, but live, and declare the works of the Lord". The spy remained behind, too frightened of the consequences if he were caught escaping with the others. Casanova and Balbi pried their way through the lead plates and onto the sloping roof of the Doge's Palace, with a heavy fog swirling. The drop to the nearby canal being too great, Casanova prised open the grate over a dormer window, and broke the window to gain entry. They found a long ladder on the roof, and with the additional use of a bedsheet "rope" that Casanova had prepared, lowered themselves into the room whose floor was 25 feet below. They rested until morning, changed clothes, then broke a small lock on an exit door and passed into a palace corridor, through galleries and chambers, and down stairs, where by convincing the guard they had inadvertently been locked into the palace after an official function, they left through a final door. It was 6:00 in the morning and they escaped by gondola. Eventually, Casanova reached Paris, where he arrived on the same day (5 January 1757) that Robert-François Damiens made an attempt on the life of Louis XV. (Casanova would later witness and describe his execution.) Thirty years later in 1787, Casanova wrote "Story of My Flight", which was very popular and was reprinted in many languages, and he repeated the tale a little later in his memoirs. Casanova's judgment of the exploit is characteristic:  He knew his stay in Paris might be a long one and he proceeded accordingly: "I saw that to accomplish anything I must bring all my physical and moral faculties in play, make the acquaintance of the great and the powerful, exercise strict self-control, and play the chameleon."