{
  "name": "Known then: Mackay's 1852 reissue",
  "desc": "Known then: card for Charles Mackay's 1852 reissue of his book; each item carries its source number from the article.",
  "lic": "CC BY 4.0",
  "lic_url": "https://creativecommons.org/licenses/by/4.0/",
  "by": "Treaties & Tradeoffs",
  "url": "https://treatiesandtradeoffs.com/ideas/extraordinary-popular-delusions/",
  "from": [],
  "how": "",
  "data_by": [
    "Charles Mackay, Memoirs of Extraordinary Popular Delusions and the Madness of Crowds, 2 vols. (London: Office of the National Illustrated Library, 1852), Project Gutenberg eBook #24518, accessed 2026-11-02, public domain",
    "Charles Mackay, Memoirs of Extraordinary Popular Delusions, 3 vols. (London: Richard Bentley, 1841), Project Gutenberg eBooks #636, #713 and #884, accessed 2026-11-02, public domain"
  ]
}