Copy of a letter, from John Frederick William Herschel to Richard Sheepshanks, dated at Collingwood Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Invites Richard Sheepshanks to dinner in Collingwood on 10 [July], as F. G. W. Struve will be there. U. J. J. Leverrier may also come, but G. B. Airy and John Lubbock cannot attend. 1? July 1847