Section XII. And it is enacted, that all copies of any Book wherein there shall be Copyright, and of which entry

XII. And it is enacted, that all copies of any Book wherein there shall be Copyright, and of which entry shall have been made in the said Registry Book and which shall have been unlawfully printed without the consent of the Registered Proprietor of such Copyright in writing under his hand first obtained shall be deemed to be the property of the Proprietor of such Copyright and who shall be registered as such, and such Registered Proprietor shall, after demand thereof in writhing, be entitled to sue for and recover the same or damages for the detention thereof.