Copy letter from Robert William Frederick Harrison, to M M Rykatcheff, Directeur, Observatoire Physique Central, Pavlovsk, Russia In continuation of his letter of the 27th September, Harrison encloses a copy of the letter from M Kupffer to Major Sabine of September 14/29, 1840, and also a copy of the draft of a letter to the Russian Minister of Finance [no enclosures]. Has not yet succeeded in finding Kupffer's letter to Major Sabine dated 30 April 1840 of which Rykatcheff would like a copy but is having enquiries made. 15 November 1897