Only the Joseph Campbell Foundation page gave free method content from the rights holder: three core stages (separation, initiation, return), each stated to be required, with the finer elements described as variations included or omitted depending on the story rather than rigid steps. John Truby's …

Only the Joseph Campbell Foundation page gave free method content from the rights holder: three core stages (separation, initiation, return), each stated to be required, with the finer elements described as variations included or omitted depending on the story rather than rigid steps. John Truby's and Syd Field's official landing pages contained product and course marketing and no stated method text, so they are not recorded; McKee and Save the Cat already exist as wave-1 curated records (mckeestory, savethecat-beat-sheets). An agent citing Campbell for a numbered beat sheet should note that this page frames the stages as flexible. Rationale: Quotes from the JCF page are in evidence/quotes.jsonl; the Truby and Field statements come from reading the landing pages only. Counterevidence: Deeper course, book or blog pages on truby.com and sydfield.com were not opened and may contain method text. Uncertainty: Which official pages (if any) quote Field, Truby or Snyder at length under the rights holder's permission is unknown. Sources: - https://www.jcf.org/learn/joseph-campbell-heros-journey - https://truby.com - https://www.sydfield.com Checked: 2026-10-17

{
  "context": "Which primary sources exist for the classic structure methods named in the gaps?"
}