Anne was the maximum length of legal protection for publishers and authors alike. Expansion and repeal Until its repeal, most extensions to copyright law were based around provisions found in the Statute of Anne. The one successful bill from the lobbying in the 1730s, which came into force on 29 September 1739, extended the provision prohibiting the import of foreign books to also prohibit the import of books that, while originally published in Britain, were being reprinted in foreign nations and then shipped to England and Wales. This was intended to stop the influx of cheap books from Ireland, and also repealed the price restrictions in the Statute of Anne. Another alteration was over the legal deposit provisions of the Statute, which many booksellers found unfair. Despite an initial period of compliance, the principle of donating copies of books to certain libraries lapsed, partly due to the unwieldiness of the statute's provisions and partly because of a lack of cooperation by the publishers. In 1775 Lord North, who was Chancellor of the University of Oxford, succeeded in passing a bill that reiterated the legal deposit provisions and granted the universities perpetual copyright on their works. Another range of extensions came in relation to what could be copyrighted. The Statute only referred to books, and being an Act of Parliament, it was necessary to pass further legislation to include various other types of intellectual property. The Engraving Copyright Act 1734 extended copyright to cover engravings, statutes in 1789 and 1792 involved cloth, sculptures were copyrighted in 1814 and the performance of plays and music were covered by copyright in 1833 and 1842 respectively. The length of copyright was also altered; the Copyright Act 1814 set a copyright term of either 28 years, or the natural life of the author if this was longer. Despite these expansions, some still felt copyright was not a strong enough regime. In 1837, Thomas Noon Talfourd introduced a bill into Parliament to expand the scope of copyright. A friend of many men of letters, Talfourd aimed to provide adequate rewards for authors and artists. He campaigned for copyright to exist for the life of the author, with an additional 60 years after that. He also proposed that existing statutes be codified under the bill, so that the case law that had arisen around the Statute of Anne was clarified. Talfourd's proposals led to opposition, and he