Includes (item 34) 'An Introductory Letter. Addressed to T. F. Buxton, Esq. on the Frightful Horrors of Modern Slavery. As Practised by the Imperial Brazilian Mining Association. In Their Mines at Gongo Soco' from F. A. Kentish (printed), 1840 (this letter was reproduced in The Anti-Slavery Reporter on 21 October 1840.