In like manner, the late Peter Force, Mayor of Washington City, and historiographer of the "American Archives," devoted forty years to amassing an extensive collection of _Americana_, or books, pamphlets, newspapers, manuscripts, and maps, relating to the discovery, history, topography, natural history, and biography of America. He carried off at auction sales, from all competitors, six great collections of early American pamphlets, formed by Ebenezer Hazard, William Duane, Oliver Wolcott, etc., representing the copious literature of all schools of political opinion. He sedulously laid aside and preserved every pamphlet that appeared at the capital or elsewhere, on which he could lay hands, and his rich historical collection, purchased by the government in 1866, thirty-three years ago, now forms an invaluable portion of the Congressional Library. Of the multitudinous literature of pamphlets it is not necessary to speak at length. Suffice it to say that the library which neglects the acquisition and proper preservation and binding of these publications is far behind its duty, both to those of its own generation, and to those which are to follow. The pamphlet literature of every period often furnishes the most precious material to illustrate the history and development of that period. The new ideas, the critical sagacity, the political controversies, the mechanical and industrial development, the religious thought, and the social character of many epochs, find their best expression in the pamphlets that swarmed from the press while those agencies were operating. The fact that multitudes of these productions are anonymous, does not detract from their value as materials for students.