Orthodox Bishop Dionisios Papagiannousis provided moral and spiritual support to the besiegers. The Austrians soon dug themselves trenches to protect their gains and their sappers dug a siege parallel close to Belgrade's covered way. The Ottomans launched four sorties in an attempt to delay the besiegers. For the next few days, Laudon emplaced his artillery batteries closer to the city. On the west bank of the Sava, the Prince of Ligne set up a battery at a position called the Sauspitz from which his artillery directed an effective fire against the Ottoman defenses. Recovering from a severe bout of fever and dosing himself with quinine, Ligne had to be half-carried by two junior officers in his inspections of the trenches. He later boasted that his guns fired 5,662 round shot and 6,083 bomb shells during the siege. Two other high-ranking generals involved in the siege were Joseph Maria von Colloredo-Mels und Wallsee, an artillerist, and Karl Clemens von Pellegrini, an engineer. On the morning of 6 October 1789, the Austrian batteries began a very intense bombardment, under which Belgrade's defenses rapidly crumbled. At 1:00 pm that day Osman Pasha demanded a 15-day suspension of military activity. Laudon replied, "Not 15 hours," and the bombardment continued until 9:00 am on 7 October. At that time the Ottoman commander requested a 6-hour suspension, which Loudon granted. After several hours of silence, Osman Pasha and two of his officers emerged from the main gate and requested a parley. They were quickly ushered to Laudon's headquarters where the capitulation was signed. In exchange for the surrender of Belgrade on 8 October, the Ottoman garrison was given a free passage with their personal and private possessions to Orșova. A prisoner exchange was also arranged between the combatants. Loudon marched the army to Smederevo, which was captured. Then the Austrian army blockaded Orșova, which finally surrendered in April 1790. Other Austrian forces were also successful. Saxe-Coburg occupied Bucharest, Friedrich Wilhelm, Fürst zu Hohenlohe-Kirchberg seized northern Wallachia, Anton Lipthay de Kisfalud overran the Timok valley, and Stephan Mihaljevich took Niš. The citizens of Vienna were elated by the victory.