Two closely-written manuscripts have been preserved at the museum in Wisbech, birthplace of Thomas Clarkson, describing interviews that Clarkson conducted with Alexander I of Russia in Paris in September 1815, and in Aix-la-Chapelle in 1818. In the first interview, Alexander gave an account of his efforts to promote abolition among the European leaders at the Congress of Vienna, and promised his continuing support to the abolitionists. At their meeting three years later, Clarkson called on Alexander to back his proposal for complete abolition by 1820, and an agreement classifying slave trading as piracy. Clarkson also asked for Alexander's help in presenting abolitionist addresses to the Emperors of Prussia and Austria, and his influence in favour of Haiti, still fearful of a French re-invasion. He presented the Emperor with books and examples of African craftsmanship.