Gervaise found that no attempt was to be made to take the offensive against the Turks, and that they were to be permitted to advance against the city without interference. Many of the more fiery spirits among the knights chafed at this prohibition. The records of the past showed that armies as large as that of Mahomet had suffered defeat at the hands of bodies of knights no stronger than that gathered for the defence of Rhodes. D'Aubusson, however, knew that between the undisciplined hordes that gathered in countless numbers to oppose the crusaders, and the troops of Mahomet, well trained in warfare, who had borne his standard victoriously in numerous battles, there was but little comparison. They were commanded, too, by Paleologus, a general of great capacity. Under such circumstances, although victory might be possible, the chances of defeat would be far greater, and while victory could be only won at a great sacrifice of life, defeat would mean annihilation to the garrison, and the loss of the city upon whose fortifications such an enormous amount of money and labour had been expended.

On the other hand, he felt perfectly confident that the city could be successfully defended, and that at a cost of life far less than would be attained by a victory in the open field, while the blow that would be inflicted upon the prestige and power of the enemy, by being ignominiously compelled to retire to their ships, after the failure of all their attacks, would be as great as if their army had been defeated in the field. Therefore the grand master, with the full assent of his leaders, turned a deaf ear to the entreaties of the younger knights, that they might be allowed to make a sortie. He calmly waited behind the formidable defences he had for the past ten years been occupied in perfecting, in anticipation of the assault of the Moslem host.

Accordingly, after disembarking at their leisure, the Turkish army moved forward, and took their post upon St. Stephen's Hill. From this eminence they commanded a full view of the town, the hills sloping gently down to the foot of the walls. In later times the first care of a general commanding the defence would have been to construct formidable works upon this commanding position. But the cannon of that period were so cumbrous and slowly worked, and so inaccurate in their aim, that the advantage of occupying a position that would prevent an enemy from firing down into a town was considered to be more than counterbalanced by the weakening of the garrison by the abstraction of the force required to man the detached work, and by the risk of their being surrounded and cut off without the garrison of the town being able to aid them.

That the defence of St. Stephen's Hill was considered unnecessary for the safety of Rhodes is shown by the fact that no attempt had been made to fortify it when, forty years later, the Moslems again besieged the city.

There was no shadow of apprehension felt by the garrison of Rhodes as the great array of their foes was seen moving on to the hill, and preparing to pitch its camp. On the summit was the great tent of the pasha; round this were the marquees of the other commanders, while the encampments of the troops stretched far away along the upper slopes of the hill.

Previous to the despatch of the expedition, the sultan had made preparations for aiding his arms by treachery. The agent he had sent to propose a temporary truce had, during his stay on the Island, made himself thoroughly acquainted with the outline of the works. A very accurate plan of them had also been obtained from an inhabitant of Rhodes, who had abandoned Christianity and taken service with the Turks.

In addition to this he had arranged with a renegade German, known as Maitre Georges, a man of very great ability as an artilleryman and engineer, to desert to the city, and there do all in his power to assist the besiegers, both by affording them information and by giving bad advice to the besieged. On the day after Paleologus, who was himself a renegade Greek, had established his camp, he sent in a herald to summon the city to surrender, at the same time making lavish promises that the lives and property of the native population should be respected, and that they should be allowed to continue to reside there, to enjoy the full exercise of their religion and of all other rights they possessed. The pasha had no real hope that the knights would obey the summons, but he thought that he might excite a spirit of disaffection among the townspeople that would, when the crisis came, greatly hamper the efforts of the defenders.

The Rhodians, however, were well satisfied with the rule of the Order. The knights, although belonging to the Catholic Church, had allowed the natives of the Island, who were of the Greek faith, perfect freedom in the exercise of their religion, and their rule, generally, had been fair and just. The wealth and prosperity of the Island had increased enormously since their establishment there, and the population had no inclination whatever to change their rule for that of the Turks. The summons to surrender being refused, the enemy made a reconnaissance towards the walls.

D'Aubusson had no longer any reason for checking the ardour of the knights, and a strong body of horsemen, under the command of De Monteuil, sallied out and drove the Turks back to their camp.

Maitre Georges, who was acting as the military adviser of the pasha, saw at once that the weakest point of the defence was Fort St. Nicholas, at the extremity of the mole along the neck of land dividing the outer from the inner port. At a short distance away, on the opposite side of the port, stood the church of St. Anthony, and in the gardens of the church a battery was at once erected. The garden was but three hundred yards from St. Nicholas, and the danger that would arise from the construction of the battery was at once perceived, and an incessant fire opened upon it from the guns on the wall round the grand master's palace. Numbers of the workmen were killed, but the erection of the battery was pushed on night and day, and ere long three of the immense cannon that had been brought from Constantinople,—where sixteen of them had been cast under the direction of Maitre Georges—were placed in position. These cannon were eighteen feet in length, and carried stone balls of some twenty-six inches in diameter.