Possible Simon inks per atlastales.com. Previous indexer credited Syd Shores.
Inside front cover. Issue referred to just as "Marvel Comics No. 26" in the large headline (no "Mystery").
The Destroyer's last name is Marlowe in this issue, but was Marlow when he was introduced in #6.
Art credits from Dr. Michael J. Vassallo.
Script credits suggested by the Who's Who.
Text story with illustrations.
Ger Apeldoorn notes at atlastales.com that Sekowsky usually penciled but the art does not look like his. Klein's signature comes first.