We can well sympathise with the merchant seamen of those days. The perils of wind and wave were as nothing compared with the fear of falling into the hands of powerful desperadoes, who not merely were all-powerful afloat but in their strong fortresses on shore were most difficult to deal with. With the Balearic Islanders in the west, the Cilicians in the east, the Carthaginians in the south, the Illyrians along the Adriatic in their low, handy liburnian galleys, there were pirates ready to encircle the whole of the Mediterranean Sea. It is worth noting—for he who reads naval history must often be struck with the fact that an existing navy prevents war, but the absence of a navy brings war about—that as long as Rome maintained a strong navy piracy died down: but so soon as she neglected her sea-service piracy grew up again, commerce was interrupted both east and west, numerous illustrious Romans were captured and either ransomed or put to death, though some others were pressed into the service of the pirates themselves. By means of prisoners to work at the oars, by the addition of piratical neighbours and by mercenaries as well, a huge piratical community with a strong military and political organisation continued to prevent the development of overseas trade. This piracy was only thwarted by keeping permanent Roman squadrons always ready. Of course there were pirates in these early times in waters other than the Mediterranean. On the west coast of Gaul the Veneti had become very powerful pirates, and you will recollect how severely they tried Cæsar, giving him more trouble than all the rest of Gaul put together. They owned such stalwart ships and were such able seamen that they proved most able enemies. During the time of the Roman Empire piracy continued also on the Black Sea and North Sea, though the Mediterranean was now for the most part safe for merchant ships. But when the power of Rome declined, so proportionately did the pirates reappear in their new strength. There was no fearful navy to oppose them, and so once more they were able to do pretty much as they liked. But we must not forget that long before this they had ceased to be regarded as the equivalent of hunters and fishermen. They were, by common agreement, what Cicero had designated “enemies of the human race”: and so they continued till the nineteenth century, with only temporary intervals of inactivity.