Joseph, knowing this, took to visiting him in the night vigils when it was possible, before holy days and vacations when there was no collegium on the following morning; often he would come with his father at the tenth hour of the night and remain until morning. Sometimes he would take the duties of the watchman while his father slept and sound the Heynals at each hour and inspect the city regularly from each of the tower windows in order to sound the alarm whenever a red tongue of flame leaped into the sky. Joseph had progressed each day in playing the trumpet and could now sound the Heynal as well as his father. [Illustration: _At the Right Is the Florian Gate, an Entrance to the City. This Entrance Is Protected by a Barbican, the Building in the Foreground with the Pointed Towers._] He was in the tower with Pan Andrew on this same night that Peter and his caravan of merchants were encamped in their carts in the market place below the church. The moon was at its full and the shadows of the church towers fell far across the street and market. Down in front of the church doors a watchman with lantern and halberd paced to and fro calling out, as was his custom, the hours as they were sounded from the tower. He had already called out the first hour when Peter of the Button Face, watching from a cart across the square, decided to make his first move. “Michael,” he called in a loud whisper, “Michael.” And at that a man in a suit of leather with hat to match and thick sandals slid out of the next cart. He had already divested himself of the round turban and blankets that he wore as an Armenian merchant, and his body seemed to move in a constant succession of quiverings and glidings—in fact he had always been known in the Ukraine as the Snake—and he stood for a moment by his chief’s wagon to receive a whispered command in one ear. Then, true to his name, he wriggled beneath a dozen carts and past the flank of an outhouse near the church to take refuge behind a tree that grew at this corner of the Rynek. Doubled up here he waited until the watchman should pass in front of the church. He had not long to wait.