=Marine Commerce.=--For their sea commerce they built ships from the cedars of Lebanon to be propelled by oars and sails. In their sailing it was not necessary to remain always in sight of the coast, for they knew how to direct their course by the polar star. Bold mariners, they pushed in their little boats to the mouth of the Mediterranean; they ventured even to pass through the strait of Gibraltar or, as the ancients called it, the Pillars of Hercules, and took the ocean course to the shores of England, and perhaps to Norway, Phœnicians in the service of a king of Egypt started in the seventh century B.C. to circumnavigate Africa, and returned, it is said, at the end of three years by the Red Sea. An expedition issuing from Carthage skirted the coast of Africa to the Gulf of Guinea; the commander Hanno wrote an account of the voyage which is still preserved. =Commodities.=--To civilized peoples the Phœnicians sold the products of their industry. In barbarous countries they went to search for what they could not find in the Orient. On the coast of Greece they gathered shell-fish from which they extracted a red tint, the purple; cloths colored with purple were used among all the peoples of ancient times for garments of kings and great lords. From Spain and Sardinia they brought the silver which the inhabitants took from the mines. Tin was necessary to make bronze, an alloy of copper and tin, but the Orient did not furnish this, and so they sought it even on the coasts of England, in the Isles of Tin (the Cassiterides). In every country they procured slaves. Sometimes they bought them, as lately the slavers bought negroes on the coast of Africa, for all the peoples of this time made commerce in slaves; sometimes they swooped down on a coast, threw themselves on the women and children and carried them off to be retained in their own cities or to be sold abroad; for on occasion they were pirates and did not scruple to plunder strangers. =The Secrets Kept by the Phœnicians.=--The Phœnicians did not care to have mariners of other peoples come into competition with them. On the return from these far countries they concealed the road which they had travelled. No one in antiquity knew where were the famous Isles of the Cassiterides from which they got their tin. It was by chance that a Greek ship discovered Spain, with which the Phœnicians had traded for centuries. Carthage drowned the foreign merchants whom they found in Sardinia or on the shore of Gibraltar. Once a Carthaginian merchantman, seeing a strange ship following it, was run aground by the pilot that the foreigner might not see where he was going.