| Identifier   | Title | Level of description | Date | Digital object |  | 
                                  
              | 61-63 | Letters from Alexander Bridport Becher | Item | 1832-1836 |  |  | 
                                  
              | 78-79 | Letters from Sir Edward Belcher | Item | Aug., Oct. 1847 |  |  | 
                                  
              | 160 | Letter from William Daniel Conybeare | Item | [19th cent.] |  |  | 
                                  
              | 162-163 | Letters from Pierre Daussy | Item | 1833, 1835 |  |  | 
                                  
              | 164 | Letter from Sir Henry Mangles Denham | Item | 24 Sept. 1835 |  |  | 
                                  
              | 178 | Letter from Mary Henrietta FitzRoy | Item | 8 Aug. [18--] |  |  | 
                                  
              | 181 | Letter from Newson Garrett to William Long | Item | 22 Sept. 1847 |  |  | 
                                  
              | 182 | Letter from Henry Goulburn | Item | 23 Aug. 1835 |  |  | 
                                  
              | 188-190 | Letters from Charles Greaves | Item | 1837-[1838] |  |  | 
                                  
              | 203 | Letter from William Henry | Item | 9 Dec. 1833 |  |  | 
                                  
              | 246 | Letter from J. W. May to Henry Goulburn | Item | 21 Aug. 1835 |  |  | 
                                  
              | 250 | Letter from John Newman | Item | 4 Oct. 1847 |  |  | 
                                  
              | 251 | Letter from Arthur Bedford Orlebar | Item | 17 Aug. 1847 |  |  | 
                                  
              | 257-258 | Letters from Sir John Rennie | Item | 1834, 1835 |  |  | 
                                  
              | 259 | Letter from Sir John Richardson | Item | 5 Nov. 1846 |  |  | 
                                  
              | 196a-198 | Letters from N. Robertson to Captain Basil Hall | Item | [1833] |  |  | 
                                  
              | 260-293 | Letters from Daniel Ross | Item | 1837-1847 |  |  | 
                                  
              | 298 | Letter from William Henry Smyth to Captain Hewitt | Item | 4 June 1832 |  |  | 
                                  
              | 300 | Letter from William Henry Smyth | Item | 20 Apr. 1841 |  |  | 
                                  
              | 310-311 | Letters from Samuel Stutchbury | Item | 1833, 1835 |  |  | 
                                  
              | 314-316 | Letters from W. Waldegrave | Item | 1833-1835 |  |  | 
                                  
              | 328 | Letter from Joseph B. Yates | Item | 20 July 1833 |  |  | 
                                  
              | 326 | Letter from Charles Wood, 1st Viscount Halifax | Item | 25 May 1837 |  |  | 
                                  
              | 323 | Letter from William Whewell to Charles Wood | Item | 5 Dec. 1837 |  |  | 
                                  
              | 30 | Draft report, "Observations of the tides at Sta. Cruz, Teneriffe, 1856" by an unidentified person | Item | Oct. 1856 |  |  | 
                                  
              | 42 | Two pamphlets and a map relating to tides | Item | 1828-1843 |  |  | 
                                  
              | 183 | Letter from Richard Hall Gower to Mr Decker | Item | 6 Sept. 1832 |  |  | 
                                  
              | 1 | Companion to the almanac, for 1837 and On the tides by J. W. Lubbock | Item | [1836] |  |  | 
                                  
              | 4 | Offprint, Account of Mr Whewell's researches on the tides | Item | [1838] |  |  | 
                                  
              | 7-12a | Printed directions for tide observations and queries for nautical men | Item | [19th cent.] |  |  |