Item author: Sir Isaac Newton and other scientistsItem date: 17th & 18th Centuries(this is an approximate date)Grant Value: 20,000Item cost: 6,373,820Item date acquired: 2000Item institution: Cambridge University LibraryTown/City: CambridgeCounty: Cambridgeshire Includes material concerning the dispute with Leibnitz over priority in the invention of the calculus Item Provenance The Earl of Macclesfield, private treaty via Sothebys Letter from Isaac Newton to John Collins, 6 February 1669/70, written from Trinity College. Image courtesy of Cambridge University Library.