A second visit of Roberts to England, in 1852, four years later, to adjust disputes with traders who claimed certain tracts of land, was equally successful, and France, under Louis Napoleon, presented him with arms and uniforms for the equipment of the Liberian troops. In 1852 Prussia also extended her friendship, soon followed by Brazil and the free Hanse towns. In 1862, the necessity for cautious dealing with the race question having passed away, the United States government at last formally recognized the Republic, and Holland, Sweden, Norway, and Hayti formed treaties in 1864. The consent of Portugal and Denmark in 1865, and of Austria in 1867, brought Liberia into treaty relations with nearly all the leading commercial nations.

The internal condition of the Republic during the first decade was one of unprecedented growth and prosperity. The Colonization Society in America was in a flourishing condition, and gained friends on every side. Its receipts for the ten years were not far short of a million dollars; and this generous means permitted the transportation, in the same period, of over five thousand chosen emigrants. The accession of so large a force of laborers added a new stimulus to the activity awakened by self-government. Many new settlements were formed and all the older ones received an infusion of new strength. Agriculture, especially the cultivation of the great staples, rice, coffee, sugar and cotton, made rapid progress; while commerce was stimulated by the establishment of regular monthly lines of steamers between England and various points on the coast, the first of which was started in 1853. The enterprise of Holland soon added still other lines. Communication with America was at the same time facilitated by the regular trips of a large vessel built for the purpose, the gift to the Society of Mr. John C. Stevens of Maryland.

At the close of his fourth administration President Roberts decided to decline reëlection. For eight years he had been at the helm, and had brought the ship of state safely through her first perilous voyages. And now while the waters seemed smooth and skies serene he thought it best to intrust her guidance to other hands. The election took place in May, 1855, amidst scenes of political strife and party violence at once intense and short-lived. It resulted in the choice of Stephen A. Benson for President and Beverly P. Yates for Vice-President. Both were distinctly the product of Liberian training. Benson was brought over, at the age of six years, by his parents in 1822, and received his entire education in the country. He became a successful merchant and entered political life in the wake of Roberts. As chief magistrate he showed himself a practical and efficient man, with the interests of the country at heart.

One of the leading objects of Benson's policy was the improvement and elevation of the aborigines; but his designs were in part frustrated by the outbreak of a stubborn and exhausting war with the native tribes dwelling about the Sinou River. Details must be omitted for want of space; but this war devastated four settlements and sadly depleted the national treasury. It was soon afterwards that the Maryland colony at Cape Palmas was almost overwhelmed in a similar native uprising, and united with the Republic, as elsewhere narrated.

A widespread scarcity of provisions followed these wars, which gave rise to much apprehension. But this eventually did good in giving new emphasis to the fact that main reliance must be placed upon agriculture rather than trade. The great resources of Liberia were shown at a National Fair, held in December, 1858; premiums were awarded for the best specimens of coffee, arrow-root, cotton, rice, ginger, potatoes, oxen, sheep, swine, turkeys, butter, preserves; cloth and socks of African cotton; boots; soap and candles from palm oil; ploughs, hoes and other implements from native iron and home manufacture; farina; chocolate; planks, shingles, cabinet work, and many other products of Liberian agriculture and industry.

President Benson was reelected without opposition, and entered upon his second term in January, 1858. A fresh outbreak of the slave trade in this year was followed by a number of captures by U.S. cruisers, giving rise to the old difficulty in regard to the disposition of the cargoes. The Act of March 3, 1819, which had long fallen into disuse, was revived, and a contract made with the Colonization Society to transport and maintain for a twelvemonth the recaptured Africans already on the Government's hands. The substitution of small, swift steamers for the craft of older days so increased the efficiency of the navy that captures were made in rapid succession. Within two months 1,432 Africans were landed at Key West. This state of affairs made further legislation immediately necessary. Congress, acting upon the suggestion of a Presidential message, passed an Act amending the Act of March 3, 1819, which empowered the President to form a five-years' contract with "any person or persons, society or societies," to receive in Africa and care for the unfortunates rescued from slavers, for the period of one year, and at a price of $100 per capita. Commanders of cruisers were to be instructed to land their captures directly upon the coast of Liberia whenever practicable; immediate measures were to be taken for removing to Africa those already at Key West; and the sum of $250,000 was appropriated to defray expenses.

Three large vessels were at once chartered and stored with $60,000 worth of supplies; with the least possible delay the suffering crowd at Key West was transported to Liberia; but only 893 survived the passage. The effect of the new orders issued to the U.S. slave squadron was soon felt in Liberia. On August 8, 1860, the Storm King unexpectedly arrived with a cargo of 619; within twenty-four hours the Erie, prize to the steamer Mohican, followed with 867. Tidings came that still larger numbers were en route. The effect of this inundation of liberated barbarians upon the small civilized community, already surrounded by savage swarms, may be imagined. The greatest consternation prevailed, and excitement rose to fever heat. President Benson wrote to the Society that great evils would result unless means were liberally supplied, and entire control of the new arrivals given to the Liberian Government. The Society accordingly transferred the execution of its contracts to that government, and placed at its disposal all money received by their terms. This action seems to have allayed the worst apprehensions; and although over 4,000 recaptured Africans were landed within the space of two months, no harm seems to have resulted. They made rapid progress in civilization, becoming assimilated to and in many cases intermarrying with the colonists; from among them arose some of the best citizens of the Republic.

President Benson's policy in regard to the natives was successful in bringing many tribes much more closely under the influence of the government. A number of steps were taken toward actively spreading among them the arts of civilized life, improving their methods of agriculture, and checking the evils of intertribal warfare and of superstition. A poll tax of one dollar a year was levied on each male adult, to be collected from the chiefs of the several districts; with a part of the funds thus raised schools for popular instruction were to be established throughout the country.

The control and oversight by the central authority of so many small settlements scattered over a large range of coast had been greatly facilitated by the small armed cutter presented in 1848 by the English government. This was now found to be hopelessly out of repair, and was generously replaced by the donor with another and somewhat larger vessel—the Quail, an armed schooner of 123 tons. About the same time the New York Society sent over a small steamer to provide rapid and regular communication between points along the coast. In honor of a liberal benefactor it was called the "Seth Grosvenor."

The third and fourth administrations of Benson passed uneventfully, and in January, 1864, Daniel B. Warner, who, the May previous, had been elected, succeeded him. Warner was born near Baltimore, in 1812, and emigrated in 1823. The Civil War in America, with the sanguine hopes it aroused in the breast of the Negro, caused a rapid falling off in the number of applicants for transportation to Liberia. The income of the Society for once exceeded the demand upon it, and several good investments were made. Liberia, however, was demanding more cultivators. A supply came from an unexpected quarter. Two societies were organized by thrifty negroes of Barbadoes, to return to Africa and make their home in the new Republic. Agents were sent out, and sympathy with their enterprise enlisted. The Liberian Government issued a proclamation of cordial invitation, and the Legislature appropriated $4,000 to assist the colonists, increasing in their case the allotment of land from ten to twenty-five acres for each family. The Colonization Society devoted $10,000 to their aid, and despatched an experienced agent to take charge of the expedition. A large vessel was chartered, and after a pleasant voyage of thirty-three days, without the loss of a single life, 346 emigrants were landed at Monrovia. They proved a welcome and valuable acquisition, many being mechanics and skilled laborers.