I’m pretty sure that Margaret Brundage is illustrating Edmond Hamilton’s story here. In interior art Jack Binder definitely is, and boy-howdy does the illustration have a made science feel.
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Jack Blinder does extra duty on this issue baking some cheescake to illustrate another of C.L. Moore’s Jirel stories.
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This isse of Weird Tales is available to read and download at the Internet Archive.