The Treaty of Cession, 6 August 1861 ma ọ bụ Lagos Treaty of Cestion bụ nkwekọrịta dị n'etiti Alaeze Ukwu Britain na Oba Dosunmu nke Lagos (nke a na-asụ 'Docemo' na akwụkwọ Bekee) ebe Dosunmu, n'okpuru egwu nke bọmbụ ndị agha, nyere Lagos Islandy na Britain, ebe ọ na-ejigide aha na ike nke Oba, n'agbaso iwu Bekee.