Copy book of Sir John Herschel's outgoing correspondence, vol. 6, from 3 March 1840 to 27 September 1846 Bound notebook labelled n.6, likely on Ralph Wedgwood copying book though though not labelled explicitly. Copy letters from multiple senders arranged in chronological order. The copying book was created using a copying machine, with a manifold writer, a patented invention to copy multiple copies of an original. Likely used as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Bound together with HS/25/1; HS/25/2; HS/25/3; HS/25/4; HS/25/5; HS/25/7. 1873