Some or all works by this author are in the public domain in the United States because they were published before January 1, 1924.

The author died in 1941, so works by this author are also in the public domain in countries and areas where the copyright term is the author's life plus 75 years or less. Works by this author may also be in the public domain in countries and areas with longer native copyright terms that apply the rule of the shorter term to foreign works.

Some or all works by this author are in the public domain in the United States because they are works of the United States federal government (see 17 U.S.C. 105).