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Draft Letter from Sir Isaac Newton to John Flamsteed, 12 April 1681 (The final copy of this letter was sent on 16 April)

Reference Code: GBR/0012/MS Add.3979.3

Scope and Contents

From the Fonds:

The Portsmouth Collection is the principal collection of Isaac Newton's scientific and mathematical papers, including early drafts of the Principia, and his correspondence with Oldenburg, Halley Flamsteed and many of the other most prominent scientists of his day.


  • Creation: 12 April 1681 (The final copy of this letter was sent on 16 April)


Conditions Governing Access

From the Fonds:

Due to the fragile nature of the material access to the collection is restricted. It is available to view in the Cambridge University Digital Library at with the exception of MS.Add.4007, which is open for consultation by holders of a Reader's Ticket valid for the Manuscripts Reading Room.


2 folio(s) (ff.2 [folio] paper) : paper

Language of Materials


Existence and Location of Copies

The copy of this letter that was sent to Flamsteed is in the Library of Corpus Christi College, Oxford (CCC 361, pp.15-18.)

Related Materials

In reply to MS Add. 3979/2.


Corr., vol. II, pp.363-367, n.255; Flamsteed, vol. I, p.784-788, n.403.

Repository Details

Part of the Cambridge University Library Repository

Cambridge University Library
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Cambridge CB3 9DR United Kingdom