Letter from W J Vertilet [?], consul, British Consulate, Koenigsberg, to General [Edward] Sabine, [President of the Royal Society], Albemarle Street, London Requesting information on potential reward money for the solution to the squaring of the circle, as he has spoken to a man who claims to be able to do it. Vertilet [?] vouches for his validity. [Place name: Kaliningrad, Russia] 19 November 1866