Copy letter, from Sir John Herschel to Walter Forman, dated at [Slough] Copy of letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Still relating to the manuscript of Walter Forman's not yet returned to him [see John Frederick William Herschel's 1831-7-28], John Frederick William Herschel explains very carefully how it was sent back and where Walter Forman should look for it. [Correspondence books contain a shorter version, partly torn out.] 20 September 1831