not distinct from the contribution of the other author or authors.
(4) Where a married woman and her husband are joint authors of a work the interest of such married woman therein shall be her separate property.
Posthumous works 17.—(1) In the case of a literary dramatic or musical work, or an engraving, in which copyright subsists at the works date of the death of the author or, in the case of a work of joint authorship, at or immediately before the date of the death of the author who dies last, but which has not been published, nor, in the case of a dramatic or musical work, been performed in public, nor, in the case of a lecture, been delivered in public, before that date, copyright shall subsist till publication, or performance or delivery in public, whichever may first happen, and for a term of fifty years thereafter, and the proviso to section three of this Act shall, in the case of such a work, apply as if the author had died at the date of such publication or performance or delivery in public as aforesaid.
(2) The ownership of an author's manuscript after his death, where such ownership has been acquired under a testamentary disposition made by the author and the manuscript is of a work which has not been published nor performed in public nor delivered in public, shall be prima facie proof of the copyright being with the owner of the manuscript.
Provisions as to Government publications 18. Without prejudice to any rights or privileges of the Crown, where any work has, whether before or after the commencement of this Act, been prepared or published by or under the direction or control of His Majesty or any Government department, the copyright in the work shall, subject to any agreement with the author, belong to His Majesty, and in such case shall continue for a period of fifty years from the date of the first publication of the work.
Provisions as to mechanical instruments 19.—(1) Copyright shall subsist in records, perforated rolls, and other contrivances by means of which sounds may be mechanically reproduced, in like manner as if such contrivances were musical works, but the term of copyright shall be fifty years from the making of the original
