- Ralph Kennedy
- What Thin Partitions (1953) [SF] by Alex Apostolides and Mark Clifton
- Sense from Thought Divide (1955) [SF] by Mark Clifton
- How Allied (1957) [SF] by Mark Clifton
-
Remembrance and Reflection (1958) [SF]
by
Mark Clifton
also appeared as:
- Variant: Remembrance & Reflexion (1965)
-
When They Come from Space (1962)
by
Mark Clifton
also appeared as:
- Variant: Pawn of the Black Fleet (1962)
- Serializations:
- Pawn of the Black Fleet (Part 1 of 2) (1962)
- Pawn of the Black Fleet (Part 2 of 2) (1962)