The great necessity of a safe and speedy overland communication with the Pacific, has directed public attention to the organization of Arizona as a separate Territory, and the desired legislation has received the unanimous endorsement of the press of the whole country. Petitions with thousands of signatures from leading citizens of the majority of the states of the Union, will be presented to Congress asking for the immediate organization of the new Territory as the best means to at once open a highway to the Pacific; and so important has this view of the question been deemed as to call from the President of the United States a recommendation in his message to Congress. No opposition has been made to the most just prayer of the people of Arizona, and it is believed that none will be made, unless it comes from New Mexico. It must be born in mind that the Gadsden Purchase was not originally an integral part of New Mexico; that it was acquired years after the treaty of Gaudaloupe Hidalgo, and was only attached to the territory of New Mexico as a temporary expedient. It must also be remembered that the Gadsden Purchase, with the portion of New Mexico which it is proposed to include within the limits of the territory of Arizona, is separated from New Mexico proper by natural boundaries; that it derives no benefit from the present connection, and that any opposition to the desired legislation arises from the Mexican population, which fears the influence of a large American emigration. Moreover, that New Mexico contains upwards of 200,000 square miles, and that its organic act provides for its partition; showing clearly that Congress anticipated, at no remote day, the settlement of the country by an American population, and its erection into several territories and states. The only effect of the present connection of Arizona with New Mexico is to crush out the voice and sentiment of the American people in the territory; and years of emigration, under present auspices, would not serve to counterbalance or equal the influence of the 60,000 Mexican residents of New Mexico. New Mexico has never encouraged American population. She is thoroughly Mexican in sentiment, and desires to remain so.