The many newspaper clippings within this should all be public domain because they were published in the U.S. before 1923. Dellschau died in 1923; his work was never published in his lifetime. There has never been any publication by authority of the copyright owner (Dellschau's heirs), so for copyright purposes they are unpublished works.

This work was never published prior to January 1, 2003, and is currently in the public domain in the United States because it meets one of the following conditions: its author died before 1956; the death date of its author is not known, and it was created before 1906; it is an anonymous work, a pseudonymous work, or a work made for hire, and it was created before 1906. The above provisions are contained in 17 U.S.C. § 303. See also this page for more information.