Letter from Balfour Stewart, Kew Observatory to Edward Sabine Stewart sends Sabine ‘documents relating to the Havana goods’ [not enclosed], and the amount he paid. Update regarding Professor Thomson’s electrometer, Dr [Alexander Dallas] Bache’s instruments have been shipped and Stewart intends to send the ‘bills and particulars’. Refers to ‘experiments on the declination magnetograph’ and obtaining a copy of ‘[Henri Victor] Regnault’s experiments in the steam engine’. 6 February 1861