Copy letter, from Sir John Herschel to Richard Jones, dated at 9 Downing St. Copy of a letter. Laments loss of William Herschel's affection; grateful for that of friends. Encloses rare book on 'arcana of Dutch commerce' that John Frederick William Herschel bought in Amsterdam. Will send list of works on same topic that John Frederick William Herschel found in library at Hague. 11 September 1822