The besieged sent out three good sailers against a small fleet of sutlers and merchants, laden with provisions for the enemy; they sunk some vessels, burnt others, and carried all prisoners likely to pay a ransom into the city. The Rhodians gained a great deal of money by this, the stipulated prices of prisoners being high.

This siege is said to be the masterpiece of Demetrius, both as to the use of acquired skill and invention. To make himself master of the port and of the towers which defended its entrance, he began his operations by sea. To facilitate his approach to the place he meant to batter, he caused two tortoises to be erected on two flat-bottomed vessels joined together. One of these was more solid and strong than the other, in order to cover the men from the enormous masses which the enemy discharged from their catapultas on the walls: the other was of a lighter structure, and intended to shield the soldiers from the flights of arrows and darts. Two towers of four stories each were erected at the same time, which exceeded in height the towers which defended the entrance to the port, and which were intended to be used in battering the latter with volleys of stones and darts. Each of these towers was placed upon ships strongly bound together.

Demetrius likewise caused a kind of floating barricado to be erected in front of these tortoises and towers, on a long beam of timber, four feet thick, through which stakes, armed at the end with large spikes of iron, were driven. These stakes were disposed horizontally, with their spikes projecting forward, in order to prevent the vessels of the port from shattering the work with their beaks.

He likewise selected some of his largest vessels, on the sides of which he erected a rampart of planks, with little windows easy to be opened. He there placed the best Cretan archers and slingers in his army, and furnished them with an infinite number of bows, small balistas or cross-bows, slings and catapultas, with other engines for shooting, in order to gall the workmen of the city employed in raising and repairing the walls of the port.

The Rhodians, seeing the besiegers turn all their efforts towards that quarter, were not less industrious to defend it; in order to accomplish which design, they raised two machines upon an adjoining eminence, and formed three others, which they placed in large ships of burden at the mouth of the little haven. A body of archers and slingers was likewise posted on each side of these situations, with a prodigious quantity of stones, darts, and arrows of all kinds. The same orders were also given with respect to the ships of burden in the great port.

When Demetrius was advancing with his ships and all his armament to begin the attack on the ports, such a violent tempest arose as rendered it impossible for him to accomplish any of his designs that day; but the sea growing calm about night, he took advantage of the darkness, and advanced without being perceived by the enemy to the great harbour: he made himself master of a neighbouring eminence, about five hundred paces from the wall, and posted thereon four hundred soldiers, who fortified themselves immediately with strong palisades.

The next morning Demetrius caused his batteries to advance with sound of trumpets and the shouts of his whole army, and they at first produced all the effect he proposed from them. A great number of the besieged were slain in this attack, and several breaches were opened in the mole which covered the port: but they were of little advantage to the besiegers, who were always repulsed by the Rhodians; and after a loss nearly equal on both sides, Demetrius was obliged to retire from the port, with his ships and machines, to be out of the reach of the enemy’s arrows.

The besieged, who had learned to their cost what advantage might be taken of the night, caused several fire-ships to sail out of the port during the darkness, in order to burn the tortoises and wooden towers which the enemy had erected: but as, unfortunately, they were not able to force the floating barricado which sheltered them, they were obliged to return into port. The Rhodians lost some of their fire-ships in this expedition, but the mariners saved themselves by swimming.

The next day, the prince ordered a general attack to be made upon the port and the walls of the place, with the sound of trumpets and the shouts of the whole army, thinking by those means to spread terror among the besieged; but they were so far from being intimidated, that they sustained the attack with incredible vigour, and displayed the same intrepidity for the eight days that it continued: actions of astonishing bravery were performed on both sides during that interval.

Demetrius, taking advantage of the eminence which his troops had seized, gave orders for erecting upon it a battery of several engines, which discharged great stones of a hundred and fifty pounds in weight against the walls and towers, the latter of which tottered with the repeated shocks, and several breaches were soon made in the walls. The troops of Demetrius advanced with spirit to seize the mole which defended the entrance into the port; but as this post was of the utmost importance, the Rhodians spared no pains to repulse the besiegers, who had already made a considerable progress. This they at last effected by a shower of stones and arrows, which they discharged upon their enemies with so much rapidity, and for such a length of time, that the latter were obliged to retire in confusion, after losing a great number of their men.