An untitled volume of copies of Flamsteed's correspondence, February 1676 - February 1679 and March 1712, with some undated letters and Flamsteed's notes, 81 folios. Some of the copy letters are in Flamsteed's hand, but most are by amanuenses.

The correspondents include (through Henry Oldenburg) J.D. Cassini, 1676-1679; Johann Hevelius, 1676-1678; Ismael Bullialdus [Boulliau], 1676; Edmond Halley; Charles Boucher (including a description to Halley of his voyage to Jamaica); Richard Towneley, 1677; and James Gregory, 1673. There are also copies of letters from Flamsteed to Sir Jonas Moore, 1678; a draft entitled 'Lectori Astronomiae Studioso' (4rv); a list of 'Bookes in my owne Library in the Closet', 1677 (24v-28v); a Hebrew alphabet with related notes (29v-31r); accounts by a curate at Burstow, 1711 (60v-62r); a translated extract from the 'Journal de Sçavans', 1677 (66r-67r); an extract from a letter by Johannes Remoquietanus describing a transit of Mercury, 1631, with a similar account by Hevelius, 1665 (67v-69v); Richard Towneley's description of his micrometer, in Latin (72r-73r); and 'E reformatis meis tabulis Eclipsum Calculi' ('Calculations of eclipses from my reworked tables'), 1675-1676 (76r-78r).