Daily entries from the 17th century London diary
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The Companion says, of this intriguingly named fellow, only:
“Primate, [Josiah]. Projector and leatherseller, of Fleet St.”—-a “projector” being an old term for a “promoter”; perhaps “entrepreneurial speculator” might be the mod equivalent. (Defoe’s famous “An Essay upon Projects” was published in 1697.)