Containing Matters which Pertain to the Concealment of Persons in an extramartian Environment henceforth engaged to certain Purposes.

Timestamps:

Carl Grunert - "The Martian Spy" (1908) (0:00)

Clare Winger Harris - "The Fate of the Poseidonia" (1927) (22:06)

Bibliography:

Amazing Stories, June 1927 issue https://archive.org/details/Amazing_Stories_v02n03_1927-06_015/mode/2up

Ashley, Mike and Tymn, Marshall B. - "Science Fiction, Fantasy and Weird Fiction Magazines" (1985)

Davin, Eric Leif - "Partners in wonder - Women and the Birth of Science Fiction, 1926-1965" (2005)

Rottensteiner, Franz - introduction to "The Martian Spy" in "The Black Mirror and Other Stories: An Anthology of Science Fiction from Germany & Austria" (2008)