The definition in the act (sec. 62) of "the date of publication" as "the earliest date when copies of the first authorized edition were placed on sale, sold, or publicly distributed by the proprietor of the copyright or under his authority" defines publication, and the clause (sec. 9) requiring the copyright notice to be affixed to each copy "published or offered for sale in the United States by authority of the copyright proprietor" confirms the principle that the copyright proprietor cannot be held responsible, nor can copyright be voided because of copies "published," offered, sold or distributed without his authority. The Copyright Office Rules and Regulations (23) add to the definition of publication the parenthetical explanation: "(_i. e._, so that all persons who desire copies may obtain them without restriction or condition other than that imposed by the copyright law)." It is questionable, however, whether this explanation does not go beyond the letter of the law. In Stern _v._ Remick, in 1910, the U. S. Circuit Court protected the copyright of a song, though only one copy had been offered for sale and sold. Advance distribution to the trade or of review copies would not constitute publication. While the law does not prescribe first publication in this country, it is at least doubtful whether a book published in another country prior to publication here, unless protected by international copyright relations, has not fallen into the public domain and thus forfeited copyright protection here. {Sidenote: Copyright notice} The first step in securing copyright, being publication "with the notice of copyright" "affixed to each copy published or offered for sale in the United States by authority of the copyright proprietor," the method and form of this notice is of first importance. The act of 1909 provides (sec. 18): "That the notice of copyright required by section nine of this Act shall consist either of the word 'Copyright' or the abbreviation 'Copr.,' accompanied by the name of the copyright proprietor, and if the work be a printed literary, musical, or dramatic work, the notice shall include also the year in which the copyright was secured by publication. In the case, however, of copies of works specified in subsections (f) to (k), inclusive, of section five of this Act, the notice may consist of the letter C inclosed within a circle, thus: (C), accompanied by the initials, monogram, mark, or symbol of the copyright proprietor: _Provided_, That on some accessible portion of such copies or of the margin, back, permanent base, or pedestal, or of the substance on which such copies shall be mounted, his name shall appear. But in the case of works in which copyright is subsisting when this Act shall go into effect, the notice of copyright may be either in one of the forms prescribed herein or in one of those prescribed by the Act of June eighteenth, eighteen hundred and seventy-four." {Sidenote: Previous statutory form}