As another December concludes, another batch of books, films, songs and paintings goes out of copyright.

This year’s categories are works in Britain (and countries with similar laws) the last of whose authors died in 1954, and works from the United States which were first published in 1929.

Last year the jewel of the public domain crown was Steamboat Willie, the first film to feature Mickey & Minnie Mouse. This year it is The Karnival Kid, the first film in which the mouse speaks. Also in the 1929 United States category are the first Marx Brothers film The Cocoanauts and the final Buster Keaton film Spite Marriage. Sherlock Holmes and Fu Manchu also make their first appearances in sound films.

Annoyingly there are some noteworthy works from that year originating outside the United States, which are now public domain there but will remain copyrighted in their home countries for some decades, such as Sir Alfred Hitchcock’s Blackmail and Hergé’s early Tintin cartoons. We do, however, get the first cartoons of Popeye the Sailor Man and Tarzan. We also get the surprisingly-old song Singin’ in the Rain.

Relatively few prominent British authors entered the public domain this year, the most recognisable ones being James Hilton and Francis Brett Young. Also dying that year was the computer scientist Alan Turing, whose most famous publication was his namesake mathematical proof. Of course, many of these works will conversely not be public domain in the United States, so their proliferation over the internet will still be limited.