This work is in the public domain because it was published in Uruguay as anonymous or pseudonymous more than 70 years ago. Under uruguayan laws 9.739, 17.616 and its 2019 amendments: "In the anonymous and pseudonymous works, the term shall be seventy years after the work has been lawfully made available to the public, unless before the said period the author reveals his identity [...]" (details).

This work was published before January 1, 1931 and it is anonymous or pseudonymous due to unknown authorship. It is in the public domain in the United States as well as countries and areas where the copyright terms of anonymous or pseudonymous works are 95 years or fewer since publication.