Hamerton Treaty was an treaty signed between Britain and the Omani Empire in 1845. It was named after Atkins Hamerton, who negotiated the treaty on behalf of Britain. The treaty addressed the issue of the Zanzibar slave trade between the Swahili coast in Zanzibar and Oman in the Arabian Peninsula, which was at the time the major part of the ancient Indian Ocean slave trade.
The Hammerton Treaty formally restricted slave trade to be legal only within the territory of Zanzibar, but Zanzibar continued to import slaves from Kilwa in the East African coast to Madagascar and the Comoros with official papers for a legal slave trade north.[1]