revolving credit: https://hudsoncook.com/attachments/SenateHrgS750.pdf?utm_source=chatgpt.com

BUDGETTED CHARGE PLAN: https://www.cambridge.org/core/journals/canadian-journal-of-law-and-society-la-revue-canadienne-droit-et-societe/article/le-developpement-du-credit-variable-dans-les-grands-magasins-montrealais-durant-lapresguerre-amenagement-contractuel-et-contrat-dadhesion/B683CFBA9BDD1E455129DEAC61FAA503

https://www.atlasobscura.com/articles/from-metal-coins-to-venmo-a-history-of-americas-credit-cards

charge accounts, debt collectors, federal report on credit cards

https://preview.tedium.co/2015/06/09/credit-card-history/?utm_source=chatgpt.com

some tidbits maybe

https://telstamps.org.uk/Telegraphs/World/USA.html?utm_source=chatgpt.com

Western union links, lots of them

charge accounts of retail merchants: https://journals.sagepub.com/doi/abs/10.1177/000271623819600117?_gl=1101m1i0_upMQ.._gaMTU4MDExMTExNy4xNzg4MDgyMDM2_ga_60R758KFDG*czE3ODgwODIwMzUkbzEkZzAkdDE3ODgwODIwMzUkajYwJGwxJGgxMDI0ODcyNDAw#core-collateral-purchase-access