The title says their entry to the public domain has been lost, not the works themselves. > Those who want to make copies without sharing anything with the orig

The title says their entry to the public domain has been lost, not the works themselves. > Those who want to make copies without sharing anything with the original artist or his/her estate You can drop "original artist" from that sentence, since the copyright term has been extended from life + 50 years to life + 70 years. Even under the original term, not only would the authors be dead, there is a good chance their children and even some of their grandchildren would be dead. The original artist who, by the way, enjoyed a world where public domain works were far more recent.