1. FO 96/175: “Slave Trade: Sir Bartle Frere’s Mission to Zanzibar Correspondence” 1872–73.
2. FO 881/2314: “Zanzibar Correspondence: Slave-Dealing and Slave-Holding by Kutchees in Zanzibar” [1819–70]. The British Library copy of this file (IOR/L/PS/18/B90) is available on the Qatar Digital Library.
3. IOR/F/4/617/15321: Bombay Government “Papers Regarding the Slave Trade on the Island of Zanzibar – The African Institution in London request the East India Company to Use Their Good Offices with the Imam of Muscat to Put an End to the Slave Traffic There” July 1815– April 1816.
4. IOR/H/521: Bombay Government “Papers on Political Matters in India; Slave Trade in Zanzibar” 1817–1823.
5. IOR/L/PS/18/B2/1: John William Kaye (Political Secretary India Office London) “Zanzibar Muscat and Persia. Memorandum by Political Secretary” 1 July 1868.