Copy letter, from Sir John Herschel to William Whewell, 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. Because of the 'severe loss' recently suffered by Mrs. Whewell, Margaret Herschel will not stay at Trinity Lodge during the B.A.A.S. meeting. John Frederick William Herschel plans to go to Ely after the meeting. 10 June 1845