This appears to be a 1982 edition isued by Faber Music, Ltd. The UK copyright law governs since this edition was first published there. If it is a 25-year term, it would not expire until Jan. 1, 2008. We'll need to find out if Daquin's keyboard works were published previously. (I suspect they were - in several of the major anthologies issued in the late 19th and early 20th centuries.)