The bombardment continued unceasingly, and on August 18 another desperate assault was made, which, like the other, failed. Yet the position of the besieged was becoming desperate: dwindling daily in numbers, they were becoming too feeble to hold the long line of fortifications; but, when his council suggested the abandonment of Il Borgo and Senglea and withdrawal to St. Angelo, La Valette remained obdurate. Why the Viceroy of Sicily had not brought help will always remain a mystery. Possibly the orders of his master, Philip II. of Spain, were so obscurely worded as to put on his own shoulders the burden of a decision; a responsibility which he was unwilling to discharge because the slightest defeat would mean exposing Sicily to the Turk. He had left his own son with La Valette, so he could hardly be indifferent to the fate of the fortress, and Malta in Turkish hands would soon have proved a curse to Sicily and Naples. Whatever may have been the cause of his delay, the Viceroy hesitated till the indignation of his own officers forced him to move, and then the battle had almost been won by the unaided efforts of the Knights. On August 23 came yet another grand assault, the last serious effort, as it proved, of the besiegers; it was thrown back with the greatest difficulty, even the wounded taking part in the defence. The plight of the Turkish forces, however, was now desperate. With the exception of St. Elmo, the fortifications were still intact. By working night and day the garrison had repaired the breaches, and the capture of Malta seemed more and more impossible. Those terrible summer months with the burning sirocco had laid many of the troops low with sickness in their crowded quarters; ammunition and food were beginning to run short, and the troops were becoming more and more dispirited at the failure of their numerous attacks and the unending toll of lives. The death of Dragut, on June 23, had proved an incalculable loss, and the jealousy between Mustapha and Piali prevented their co-operation. The whole course of the siege had been marked by a feverish haste and a fear of interruption, which showed itself in ill-drawn plans. Dragut himself, early in the siege, had pointed out the necessity of more foresight, but his warnings went unheeded. The Turkish commanders took few precautions, and, though they had a huge fleet, they never used it with any effect except on one solitary occasion. They neglected their communications with the African coast and made no attempt to watch and intercept Sicilian reinforcements.