Abstract Berbice Dutch was a creole language spoken in the Republic of Guyana in South America, a country first under Dutch, and later under British colonial rule. Owing mainly to Silvia Kouwenberg ( A grammar of Berbice Dutch Creole , De Gruyter Mouton, 1994), we were blessed with a detailed synchronic documentation of Berbice Dutch before its demise. However, the formation of the language remains clouded in mystery: its grammar and (basic) lexicon display a seemingly unique mixture of Dutch (Creole) and Eastern Ijo, as a result of which the language is often portrayed as a challenge to existing contact-linguistic theory. In this paper, a scenario is proposed that, rather than challenging the said theory, is fully grounded in it: it will be argued that the language was a case of serial glottogenesis: a first stage of creolisation was later followed by language mixing. The paper furthermore presents hitherto unknown historical data pertaining to the arrival of Ijo speakers in Berbice.