The design of "Miscegenation" was exceedingly ambitious, and the machinery employed was probably among the most ingenious and audacious ever put into operation to procure the indorsement of absurd theories, and give the subject the widest notoriety. The object was to so make use of the prevailing ideas of the extremists of the Anti-Slavery party, as to induce them to accept doctrines which would be obnoxious to the great mass of the community, and which would, of course, be used in the political canvass which was to ensue. It was equally important that the "Democrats" should be made to believe that the pamphlet in question emanated from a "Republican" source. The idea was suggested by a discourse delivered by Mr. Theodore Tilton, at the Cooper Institute, before the American Anti-Slavery Society, in May 1863, on the negro, in which that distinguished orator argued, that in some future time the blood of the negro would form one of the mingled bloods of the great regenerated American nation. The scheme once conceived, it began immediately to be put into execution. The first stumbling-block was the name "amalgamation," by which this fraternizing of the races had been always known. It was evident that a book advocating amalgamation would fall still-born, and hence some new and novel word had to be discovered, with the same meaning, but not so objectionable. Such a word was coined by the combination of the Latin _miscere_, to mix, and _genus_, race: from these, miscegenation--a mingling of the races. The word is as euphonious as "amalgamation," and much more correct in meaning. It has passed into the language, and no future dictionary will be complete without it. Next, it was necessary to give the book an erudite appearance, and arguments from ethnology must form no unimportant part of this matter. Neither of the authors being versed in this science, they were compelled to depend entirely on encyclopedias and books of reference. This obstacle to a New York editor or reporter was not so great as it might seem. The public are often favored in our journals with dissertations upon various abstruse matters by men who are entirely ignorant of what they are writing about. It was said of Cuvier that he could restore the skeleton of an extinct animal if he were only given one of its teeth, and so a competent editor or reporter of a city journal can get up an article of any length on any given subject, if he is only furnished one word or name to start with. There was but one writer on ethnology distinctly known to the authors, which was Prichard; but that being secured, all the rest came easily enough. The authors went to the Astor Library and secured a volume of Prichard's works, the perusal of which of course gave them the names of many other authorities, which were also consulted; and thus a very respectable array of scientific arguments in favor of Miscegenation were soon compiled. The sentimental and argumentative portions were quickly