Provenance

Source & edition record

This page records where the text came from, what changed in presentation, and what remains unverified.

Bibliographic source

Work: The Secret of the Ninth Planet
Author: Donald A. Wollheim
Electronic edition: Project Gutenberg electronic edition, 2010
Web source: https://www.gutenberg.org/files/33644/33644-8.txt
Accessed: 2026-08-24
Verification: source-compared
Source snapshot SHA-256: be728df5ab75beca53c308454dab70e2610756dc24ba6b3663c255b60ad2eb43

public-domain. Project Gutenberg identifies this electronic edition as public domain in the USA. View the rights record ↗