Abolition of SLAVERY. 2 manuscripts and one L.S. L.S. by Hippolyte PASSY (1793-1880), as vice-president of the "Société pour l'abolition de l'esclavage", April 27, 1837 (1 page and a half in-4); minute convening a meeting, with agenda, and on his action to "obtain as quickly as possible a solution in keeping with the true interests of humanity, France & the colonies". Manuscript entitled Répression de la Traite des Noirs (5 1/2 pages in-fol., mid-19th c.). "Our present situation with regard to the repression of the Black Slave Trade is regulated by the convention of May 29, 1845, concluded with England to replace the treaties of 1831 and 1833". This is followed by explanations of the treaty and how it is to be applied, the repression of the slave trade by maritime surveillance by two British and French squadrons on the west coast of Africa, and by the English on the east coast... "It is stipulated that treaties, for the suppression of the black traffic, will be negotiated with the native chiefs"... Manuscript (fragment, pp. 3-6), [circa 1848?], draft of an interesting plea (probably as part of a trial) denouncing slavery in the colonies, particularly in Martinique, detailing several cases, including that of the widow Marlet condemned in 1828 for abuse of her slaves, and that of Ravend-Desforges, in 1825, and the mutilations punishing slaves (severed hocks...).); he refers to the work of lawyer François-André Isambert in his fight for the abolition of slavery (4p. in-4).