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 back to "the original proprietor," does make such limitation.

Where the copyright proprietor of record is not the author, the courts may require him to prove his rights, in default of which the copyright certificate will be adjudged null and void, as was done in 1909 by the Circuit Court of Appeals both in Bosselman v. Richardson, where a son copyrighted paintings by his father and failed to prove that they had not before been published, and in Saake v. Lederer, where the court canceled the copyright of the play "Old Heidelberg" because Lederer had obtained from the German author only a license to perform and not a right to copyright.

As to copyright by others than citizens of the country, the law of 1909 provides (sec. 8) "that the copyright secured by this Act shall extend to the work of an author or proprietor who is a citizen or subject of a foreign state or nation, only: "(a) When an alien author or proprietor shall be domiciled within the United States at the time of the first publication of his work; or

"(b) When the foreign state or nation of which such author or proprietor is a citizen or subject grants, either by treaty, convention, agreement, or law, to citizens of the United States the benefit of copyright on substantially the same basis as to its own citizens, or copyright protection substantially equal to the protection secured to such foreign author under this Act, or by treaty; or when such foreign state or nation is a party to an international agreement which provides for reciprocity in the granting of copyright, by the terms of which agreement the United States may, at its pleasure, become a party thereto.

"The existence of the reciprocal conditions aforesaid shall be determined by the President of the