As soon as the tidings of the plan of Iguala reached Vera Cruz, Santa Anna hastened to give in his adhesion to the cause now truly national, which guaranteed equal rights to all under the united leadership of Iturbide and of General Guerrero, the only remaining Creole leader of the first insurrection still in arms. On the 18th day of March, 1821, he was the first to proclaim the plan of Iguala in the Plaza of Vera Cruz. This promptness of Santa Anna in proclaiming the independence determined many who were hesitating in dread of a bombardment from Spanish forces in the Castle of San Juan de Ulua; and this important step it was which first brought him prominently into notice. As a consequence of this political movement, Santa Anna was appointed second in command in Vera Cruz. CHAPTER III. Incidents of Travel.--The Great Road to the Interior.--Mexican Diligences.--The Priest was the first Passenger robbed.--The National Bridge.--A Conducta of Silver.--Our Monk visits Old Vera Cruz.--They grant to the Indians Forty Years of Indulgence in return for their Hospitality.--The Artist among Robbers.--Mexican Scholars in the United States.--Encerro. A railroad eleven miles in length, crossing the morass, connects Vera Cruz with the great National Road to the table-land of the interior. The coach in which the journey to Mexico is made is placed on a railroad track and pushed on before a crazy locomotive, while behind the engine is a long line of freight wagons. At every cow-path that crossed our track stood a flagman waving his little red flag to the train as it passed, apparently in burlesque imitation of a regular road. THE NATIONAL BRIDGE.