This work is in the public domain in Mexico for one of the following reasons:

• Its author died before 1952 (Mexico had a term of 30 years after the author's death until 1982,^[1] and no copyright term extension in 1982 or later restored copyright to expired works).
• It is an artistic or literary work published before 1918 (Mexico had a term of 30 years since publication until 1948).^[2]
• It is a work of a Mexican government (federal, state, or municipal) and it was published before more than 100 years ago (before 1 January 1926).^[3]
• Anonymous works are considered in the public domain until the author or the owner of the rights are identified.^[4]

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1. ↑ See 1963 Art.23(I).
2. ↑ See 1928 Art.1183.
3. ↑ See 1996-2018 Art.29(II).
4. ↑ See 1996-2018 Art. 153.

The copyright situation of this work is theoretically uncertain, because in the country of origin copyright lasts 100 years after the death of the author, and the date of the author's death is unknown. However, the date of creation of the work was over 150 years ago, and it is thus a reasonable assumption that the copyright has expired (see here for the community discussion). Do not use this template if the date of death of the author is known.

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This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1931.