We have a saying that _knowledge is power_. I would say that _motion is liberty_. The serfdom of the middle ages was in good degree maintained by binding man to the soil. Astriction to the soil was at once the foundation and the symbol of that serfdom. The baron became the master of the body of the man; he became also the master of his mental ideas. But when the serf acquired the power of locomotion, he laid the foundation of his emancipation; and from that hour feudalism began to crumble. As the serfs' power of motion enlarged, their liberty enlarged. As formerly they had known slavery by its symbol _immovability_, so now they tasted freedom by its symbol _motion_. The serf travelled beyond the valley in which he was born; he saw new objects; he met his fellow-men; and learned to think. At last motion was perfected; the steam-engine hissed past him, and he felt that now he was completely unchained. I do not give this as a theory of the rise and progress of modern liberty; but unquestionably there is a close and intimate connection between motion and liberty. The Popes are shrewd enough to see this connection; and herein lies their opposition to railroads. They have attempted, and still do attempt, to perpetuate papal serfdom, by tying their subjects to their paternal acres and their native town. Were my reader living in London or in Edinburgh, and wished to visit Chelsea or Portobello, how would he proceed? Go to the railway station and buy a ticket, and his journey is made. But were the country under the Pontifical Government, he would find it impossible to manage the matter quite so expeditiously. He must first present himself at the office of the prefect of police. He must state where he wishes to go to; what business he has there; how long he intends remaining. He must give his name, his age, his residence, and a certificate, if required, from his parish priest; and then, should the object of his journey be approved of, a description of his person will be taken down, a passport will be made out, for which he must pay some six or eight pauls; and after this process has been gone through, but not sooner, he may set out on his little journey. Very few of those who live in Rome were ever more than outside its walls. Even the nobles have the utmost difficulty in getting so far as Civita Vecchia; very few of them ever saw the sea. The Popes know that ideas as well as merchandise travel by rail; and that if the Romans are allowed to go from home, and to see new objects, new faces, and to hear new ideas, a process will be commenced which will ultimately, and at no distant day, undermine the papacy. But among men of ordinary intelligence there will be but one opinion regarding a system that sees an enemy not only in the Bible, but in the most necessary and useful arts,--in the steam-ship, in the railroad, in the electric telegraph; in short, in all the improvements and usages of civilized life. Such a system assuredly has perdition