We have now arrived at that period of the history of Rhodes when the first difference arose between that city and the Romans: the latter suspected that the Rhodians favoured Perseus king of Macedon, with whom they were at war, and were moreover displeased at their presuming to interfere with them in his favour. In order to watch their inclinations and motions, the senate sent three commissioners to Rhodes: these found a fleet of forty galleys, which there was reason to believe had been intended to act against the Romans; but which, by the advice of the chief magistrate, were, on the arrival of the commissioners, ordered to sea, to act in union with them. Scarce, however, were the commissioners departed, when the Rhodians became lukewarm in the cause of the Romans; and although they sent a few of their galleys to join the Roman admiral, they kept the greatest number in port, waiting the issue of the war between them and the king of Macedonia. As soon as they heard of the defeat of the former in Thessaly, they entered into negotiations with Perseus, and at the same time sent ambassadors to Rome, who complained, that in consequence of the war between Perseus and the Romans, the navigation and commerce of Rhodes was greatly injured, their island deprived of provisions and other necessaries, and the customs and duties which their maritime situation formerly afforded them kept back, from their no longer being able to sail with safety along the coasts of Asia, where they used to levy the most important and productive of them. After the defeat of Perseus, they ceased to remonstrate, and became submissive to the Romans. It is probable, however, that the Romans would have seized this opportunity of attacking them, had not Cato spoken very strongly in their favour: in consequence of his arguments and influence, and by the cession of Lycia and Caria, they were again admitted to an alliance with the Romans.