We see on our maps a little stream laid down as the boundary between Italy and Gaul. It is called the Rubicon; but when we go to Italy and look for the stream itself we do not find it so easily, because there are at least two rivers that may be taken for it. However, it is not of much importance for the purposes of history which was actually the boundary. North of the Rubicon we see the ancient city of Ravenna, which stood in old times like Venice, on islands, and like it was intersected in all directions by canals through which the tide poured volumes of purifying salt water twice every day. Now the canals are all filled up, and the city is four miles from the sea, so large have been the deposits from the muddy waters that flow down the rivers into the Adriatic at that place. Thirty-three miles south of Ravenna and nine miles from the Rubicon, the map shows us another ancient town called Ariminum. connected directly with Rome by the Flaminian road, which was built some two hundred years before the time of which we are writing. Ravenna was the last town in the territory of Cæsar on the way to Rome, and there he took his position to watch proceedings, for it was not allowed him to leave his province. [Illustration: ITALIAN AND GERMAN ALLIES, COMSTUMES, AND ARMOR.] On the first of January, 49, Curio arrived at Rome with a letter from Cæsar offering to give up his command provided Pompey would do the same. The consuls at that time were partisans of Pompey, and they at first refused to allow the letter to be read; but the tribunes of the people were in favor of Cæsar, and they forced the senators to listen to it. A violent debate followed, and it was finally voted that unless Cæsar should disband his army within a certain time he should be considered an enemy of the state, and be treated accordingly. On the sixth of the same month the power of dictators was given to the consuls, and the two tribunes who favored Cæsar--one of whom was Marc Antony--fled to him in disguise, for there was no safety for them in Rome. Now there was war. On the one side we have Pompey, proud and confident, but unprepared because he was so confident; and on the other, Cæsar, cool and unperturbed, relying not only on his army, but also upon the friends that his money and tact had made among the soldiers with him, no less than among those at Capua and elsewhere, upon which his opponent also depended.