Copy letter, from Sir John Herschel to Edward Sabine Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Invites Edward Sabine to join him and other scientists for dinner. Requests that Edward Sabine prepare a detailed description and justification of his proposed Teneriffe experiments for consideration by the Royal Society [of London] Council. 21 April 1825