An early work (1934) in the study of fourfolds is James H. Cousins’ “A Study in Synthesis”, which is available for downloading at the link below.

Cousins’ key fourfold is

• Intuition
• Cognition
• Emotion
• Action

which is similar to Jung’s psychological types except Action replaces Sensation.

Each fourth also has two movements (passive and active), and two sub-movements (subjective and objective) (see Fig. 20):

• Intuition:
  • Illumination
    • Cosmic
    • Individual
  • Inspiration
    • Creative Intention
    • Creative Imagination
• Cognition:
  • Contemplation (Philosophy)
    • Metaphysical
    • Pragmatical
  • Observation (Science)
    • Pure
    • Applied
• Emotion:
  • Aspiration (Religion)
    • Mystical
    • Cermonial
  • Creation (Art)
    • Idealistic
    • Realistic
• Action:
  • Organization
    • Ideas
    • Materials
  • Execution
    • Subjective
    • Objective

Cousins was an influence to Patrick Geddes, renowned as a town planner, who had several fourfolds of his own.

Further Reading:

James H. Cousins / A Study in Synthesis

https://archive.org/details/in.ernet.dli.2015.501469

James Cousins (22 Jul 1873 – 20 Feb 1956): An Effort of Synthesis

http://hodgers.com/mike/patrickgeddes/feature.html

https://en.wikipedia.org/wiki/James_Cousins

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