After agreeing to Retief's request Dingaan caused the Boer leader and his companions to be murdered (6th of February 1838), following up his treachery by slaying as many as possible of the other Boers who had entered Natal.
The first and fourth points of Retief's manifesto combined); (2) The Slave Question; (3) The Kaffir Question.
Cana, South Africa from the Great Trek to the Union (London, 1909), pp. 2 952 97 for the full text of Retief's manifesto.
The trekkers had been told by the lieutenant-governor of the eastern province (Sir Andries Stockenstrom) that he was not aware of any law which prevented any British subject from settling in another country, and in the words of Piet Retief's declaration they quitted the colony "under the full assurance that the English government has nothing more to require of us, and will allow us to govern ourselves without its interference in future."