Mark was born in London, England on 10 May 1844 to Mark and Jane HOWE. The surname means “Coming from an orchard where flowering plants are spread” He came to South Africa in 1868. He was a businessman.
He X Marie Amelia LEACH on 11 March 1870 in Queenstown, Cape Colony South Africa. Marie came from Fort Beaufort, Cape Colony. She was the daughter of John & Sarah Ann HINDS.
Mark and Marie had eight children all born at Whittlesea, a military outpost, Cape Colony.

b1 Cyril Harry * 14 November 1870, †13 July 1917 at King William’s Town, Cape Province, ? King William’s Town, Urban, Main Cemetery,.
b2 Mark Moorland * 3 February 1872, † 1 June 1935 at Johannesburg, Transvaal, X Florence Naud Victoria AYLING at 1 April 1907
b3 John Rooksby * 25 June, 1873, † 21 September 1902 at King William’s Town, ? King William’s Town, Urban, Main Cemetery.
b4 Clare * 29 October, 1874, † 1955, X Jack ELLIOTT
b5 Harold Evelyn Rooksby * 17 September 1876, X Christa van der RIET at 25 December 1906
b6 Madelaine Rose * 7 December 1878, X Morton William BARNES-WEBB on 30 April 1900 in Stutterheim, Cape Colony
b7 Robert William McDonald * 19 May 1880, † 25 August 1933 at Standerton, Transvaal, ? Standerton, Urban, Old Cemetery, X Winifred Cecilia Florence MERRY, XX Ethel Agnes RUSSELL 19 December 1908
b8 Evelyn Rooksby * 30 September, 1885, † 1949, X Herbert Henry BUSH

Mark died on 29 November 1911 in East London, Cape Province and his wife, Marie 26 years later on 7 July 1938. At the time of her death she was staying in Sea Point, Cape Town. Cape Province

Sources:
British records
Naairs
FamilySearch