# License status

Status: unknown

Reason: published 1946 (book text, pdf p.2: "First Published in 1946"), later than 1930, so the date rule does not clear it; confirm before sharing

Date checked: 2026-10-17

Rule: published 1930 or earlier is public domain in the US as of 2026; anything else is unknown until confirmed. Status never blocks audio production. Nothing is published.