"(Sec. 60.) That of any articles undisposed of as above provided, together with all titles and correspondence relating thereto, the Librarian of Congress and the register of copyrights jointly shall, at suitable intervals, determine what of these received during any period of years it is desirable or useful to preserve in the permanent files of the copyright office, and, after due notice as hereinafter provided, may within their discretion cause the remaining articles and other things to be destroyed: _Provided_, That there shall be printed in the Catalogue of Copyright Entries from February to November, inclusive, a statement of the years of receipt of such articles and a notice to permit any author, copyright proprietor, or other lawful claimant to claim and remove before the expiration of the month of December of that year anything found which relates to any of his productions deposited or registered for copyright within the period of years stated, not reserved or disposed of as provided for in this Act: _And provided further_, That no manuscript of an unpublished work shall be destroyed during its term of copyright without specific notice to the copyright proprietor of record, permitting him to claim and remove it. {Sidenote: Fees} {Sidenote: Only one registration required} "(Sec. 61.) That the register of copyrights shall receive, and the persons to whom the services designated are rendered shall pay, the following fees: For the registration of any work subject to copyright, deposited under the provisions of this Act, one dollar, which sum is to include a certificate of registration under seal: _Provided_, That in the case of photographs the fee shall be fifty cents where a certificate is not demanded. For every additional certificate of registration made, fifty cents. For recording and certifying any instrument of writing for the assignment of copyright, or any such license specified in section one, subsection (e), or for any copy of such assignment or license, duly certified, if not over three hundred words in length, one dollar; if more than three hundred and less than one thousand words in length, two dollars; if more than one thousand words in length, one dollar additional for each one thousand words or fraction thereof over three hundred words. For recording the notice of user or acquiescence specified in section one, subsection (e), twenty-five cents for each notice if not over fifty words, and an additional twenty-five cents for each additional one hundred words. For comparing any copy of an assignment with the record of such document in the copyright office and certifying the same under seal, one dollar. For recording the extension or renewal of copyright provided for in sections twenty-three and twenty-four of this Act, fifty cents. For recording the transfer of the proprietorship of copyrighted articles, ten cents for each title of a book or other article, in addition to the fee