The garrison sent a Knight, renowned for his bravery, to report these conditions to the Grand Master and to ask for permission to withdraw. La Valette, feeling it imperative that the fort should hold out to the last minute, sent him back with orders that it was to be defended to the end. The garrison, amazed by his reply, sent a prayer for relief, failing which they would sally forth, sword in hand, to meet their death in open fight rather than be buried like dogs beneath the ruins. The Grand Master received the request with the stern comment that, not only were their lives at the disposal of the Order, but the time and manner of their death; but to make sure that their complaints were justified he would send three Knights to investigate the condition of the fort. One of the three (probably in collusion with La Valette) maintained the fort could be held, and offered himself to hold it with volunteers, who were immediately forthcoming in large numbers; but when the message arrived at St. Elmo announcing that the garrison was to be relieved, there was consternation among the defenders, who, now realising the ignominy of their prayer, sent out yet another request to St. Angelo, this time to be allowed to hold St. Elmo to the death. After some delay the Grand Master granted the permission. This was June 14; on the 16th the Ottomans delivered a grand assault. The fort was attacked on three sides, from Mount Sceberras and on each flank. The guns of St. Angelo rendered great service all day by raking the attacking forces in enfilade, and especially by breaking up the flank attack from the side of the Grand Harbour. All day long the battle went on with unabating fury; time after time the Janissaries burst over the ruined walls, and each time they were repulsed. Attacked on all sides, the few defenders fought with dauntless heroism, and when the night fell the Maltese Cross still waved over the fort. Reinforcements were dispatched as soon as night set in, and the volunteers far exceeded all requirements. Now at last the Turkish commanders perceived that, to capture St. Elmo, it must be isolated from St. Angelo. In the course of the next few days a battery was constructed on the promontory at the entrance of the Grand Harbour where Fort Ricasoli stood in later times, and another was mounted on the side of Mount Sceberras to sweep the landing place beneath the fort. Both batteries cost many Turkish lives, but their construction and the extension of the investing trenches to the Grand Harbour meant the complete isolation of St. Elmo. The Turks sustained their greatest loss when Dragut, while superintending the works, received a wound from which a week later he died.