Datable items in Flamsteed's hand, including tables 'Pro inscriptione equationum lunarum posita maxima 4.57.13' ('For the inscribing of lunar equations, the greatest proposed 4.57.13'), 1675 (22r); 'Observationum Caelestium Certiorum ... ab Astronomis Anglicanis factarum, Specilegium: vel collectio' ('A harvest or collection of the more accurate celestial observations ... made by English astronomers'), containing extracts from the work of William Gascoigne, William Crabtree and Richard Towneley (23v-25v), with diagrams from a survey of the Derwent; 'Originall draughts of my Instruments', showing the sextant, 1675 (26r-27r); a diagram of sunspots, 1676 (34r); notes on timekeeping, 1677 (36r-38r); diagrams of transits of Mercury, 1677 and 1661 (40r-42r); calculations relating to RGO 1/72 (43rv); 'A Remark on a passage in the Telluris Theoria Sacra ... 1685' [by T. Burnet] (44r-46v); sermon notes (51r, 52v); sketches for star maps, 1690 (53r, 54r); a design for a decimal clock- or instrument-dial marked with the names of Flamsteed and Tompion, 1691 (55r); an eclipse sketch (64r); and notes on ancient astronomers (65r-66r, 69r).