I recently found the following baptisms on FamilySearch, in the parish of Nether Seal.
I believe they are probably the same family
Children of Thomas Morris & Sarah at (Nether) Seal
Thomas baptised 25 May 1806
William baptised 23 Oct 1808
Sarah baptised 14 Feb 1813
Elizabeth baptised 7 Sep 1815
James baptised 8 Aug 1817
Frances baptised 27 Aug 1820
Catherine baptised 1 Dec 1822
If this is correct, then four of the children, Thomas, William, James and Frances emigrated to the Cape Colony. It seems that Thomas and William emigrated first, and later invited their siblings to join them. James apparently emigrated about 1834, when he was 17, and married Mary Huskisson in Cape Town. Frances married Francis Stewardson and lived in what is now Namibia.
I would be interested in knowing about the antecedents of this family and where and when the parents, Thomas and Sarah, married, and what happened to the other children, Sarah, Elizabeth and Catherine, and if anyone else is researching this family.