When we first met him, Fero battled scientific menaces on present-day (1940s) Earth.
As of his next appearance, without explanation, he's set in the far future!
This never-reprinted tale from Fiction House's Planet Comics #6 (1940) was written and illustrated by Al Bryant under the pen-name "Allison Brant".
The change in venue from present to future without any in-story explanation (not even a caption like "returing from the past to the 21st Century..." or some-such) seems odd considering the same writer/artist is doing this follow-up tale.