In southern India : a visit to some of the chief mission stations in the Madras presidency / by Mrs. Murray Mitchell.

http://www.archive.org/details/insouthernindivi00mitcuoft

The law and custom of slavery in British India : in a series of letters to Thomas Fowell Buxton, Esq. by William Adam; Thomas Fowell Buxton, Sir

http://books.google.com/books?id=plhkPFrJ1QUC&dq=law+and+custom+of+slavery+in+British+India