Sir Joseph Norman Lockyer correspondence and research papers: additional Lockyer copy correspondence relating to Meadows' biography of Lockyer These letters consists of photocopied letters to Norman Lockyer which were photocopied and used by Professor A J Meadows in 1967 during his research on 'Science and Controversy: a Biography of Norman Lockyer' (published 1972). The majority of these letters have been photocopied from the originals held within the main Lockyer correspondence sequence held by Exeter University Library EUL MS 110 (then held at the Norman Lockyer Observatory). However, some letters have additionally been photocopied from other unspecified sources: some (but not all) of these have been photocopied and inserted into the main listed alphabetical Lockyer correspondence sequence. Further copies of correspondence used by Professor Meadows in his biography of Lockyer were added to the collection in 2006. Mid 20th century-late 20th century