Complex sentence: Following the imperialist scheme by which Lord Carnarvon had brought about Confederation in Canada, it was thought that a similar plan might succeed in South Africa and in 1874, Sir Henry Bartle Frere was sent to South Africa as high commissioner to instigate the scheme.
Split into simpler sentences: Following the imperialist scheme by which Lord Carnarvon had brought about federation in Canada, it was thought that a similar plan might succeed in South Africa. In 1874, Sir Henry Bartle Frere was sent to South Africa as high commissioner to instigate the scheme.