We have contented ourselves with this short abstract of the Periplus of the Euxine, because we have already given all the important information it contains on the subject of the commerce of this sea. It is very inferior in merit to the Periplus of the Euxine, which has also been attributed to this Arrian, though Dr. Vincent, we think, has proved that it is the work of an earlier writer, and of a merchant. As the Roman conquests extended, their geographical knowledge of course increased. In the reign of Antoninus Pius, their armies had forced a passage much further north in Britain than they had ever ventured before. One of the results of this success was a maritime survey, or rather two partial surveys of the north part of Britain, from which the geography of that part of the island was compiled by Ptolemy. The maritime laws of the Rhodians, or those which passed under their name, seem to have been the basis and authority of the Roman maritime laws at this period; for we are told, that when a merchant complained to the emperor that he had been plundered by the imperial officers at the Cyclades, where he had been shipwrecked, the latter replied, that he indeed was lord of the earth, but that the sea was governed by the Rhodian laws, and that from them he would obtain redress. This part of the Rhodian law, however, had been but lately adopted by the Romans; for Antoninus is expressly mentioned as having enacted, among other laws, that shipwrecked merchandize should be the entire property of the lawful owners, without any interference or participation of the officers of the exchequer, and that those who were guilty of plundering wrecks should be severely punished.