Nor shall the property thus intended to be secured to the woman be alienated otherwise than by her free and voluntary consent, and such alienation may be made by her either by sale, devise, or otherwise. SECTION 11. In all cases in which estates are insolvent, the widow shall be entitled to one third of the real estate during her natural life, and to one third of the personal estate, which she shall hold in her own right, subject to alienation by her, by sale, devise, or otherwise. SECTION 12. No person shall be entitled to hold real estate in this Republic unless he be a citizen of the same. Nevertheless this article shall not be construed to apply to colonization, missionary, educational, or other benevolent institutions, so long as the property, or estate is applied to its legitimate purpose. SECTION 13. The great object of forming these colonies being to provide a home for the dispersed and oppressed children of Africa, and to regenerate and enlighten this benighted continent, none but persons of color shall be admitted to citizenship in this Republic. SECTION 14. The purchase of any land by any citizen, or citizens from the aborigines of this country for his or their own use, or for the benefit of others, as estate or estates, in fee simple, shall be considered null and void to all intents and purposes. SECTION 15. The improvement of the native tribes and their advancement in the art of agriculture and husbandry being a cherished object of this government, it shall be the duty of the President to appoint in each county some discreet person whose duty it shall be to make regular and periodical tours through the country for the purpose of calling the attention of the natives to those wholesome branches of industry, and of instructing them in the same, and the Legislature shall, as soon as it can conveniently be done, make provisions for these purposes by the appropriation of money. SECTION 16. The existing regulations of the American Colonization Society, in the Commonwealth, relative to immigrants, shall remain the same in the Republic until regulated by compact between the Society and the Republic; nevertheless, the Legislature shall make no law prohibiting emigration. And it shall be among the first duties of the Legislature, to take measures to arrange the future relations between the American Colonization Society and this Republic. SECTION 17. This Constitution may be altered whenever two thirds of both branches of the Legislature, shall deem it necessary; in which case the alterations or amendments, shall first be considered and approved by the Legislature by the concurrence of two thirds of the members of each branch and afterwards by them submitted to the people, and adopted by two thirds of all the electors at the next biennial meeting for the election of Senators, and Representatives.