The Sunken Empire

From Author Wars - https://authorwars.com/books/the-sunken-empire-198707.html

Overview:

Title: The Sunken Empire
Author: uncredited
Year: 1931
Type: Interior Art

Editions/Publications:

Unknown. Astounding Stories of Super-Science, January 1931 (Unknown, uncredited, Reader's Guild, $0.20, 148 pages, pulp, MAGAZINE)
2009 . Astounding Stories of Super-Science, January 1931 (2009, uncredited, Project Gutenberg, ebook, Anthology)