This work (William Pitt Addresing the House of Commons , by Karl Anton Hickel) is free of known copyright restrictions.
This work (The Petition for Abolishing the Slave-Trade, by World History Archive) is free of known copyright restrictions.
This work (To the Friends of Negro Emancipation, by Alexander Rippingille, David Lucas) is free of known copyright restrictions.
This work (East Indian Immigrants in Cacao Estate Trinidad, by unknown) is free of known copyright restrictions.