wheels, wheel spacing and other considerations permitting, was begun by A.G. Watson during his term in office as CME and was continued by his successors. The reduction of tractive effort caused by the larger wheels was made up by increasing boiler pressures or by fitting larger cylinders or both, as required. This policy resulted in more mileage between heavy repairs, less cost-per-mile on repairs and locomotives capable of higher speeds. Service The Class 16DA Pacifics were initially placed in passenger service between Johannesburg and Kimberley where they regularly worked trains like the Union Express and Union Limited, which became the Blue Train after the Second World War. From 1930 the new Henschel-built wide-firebox Class 16DA took over this duty. In 1939–1940, when new air-conditioned rolling stock was placed in service on the Union Limited and Union Express services between Cape Town and Johannesburg, all the Class 16DA and Class 16E locomotives were transferred to Bloemfontein in the Orange Free State. From here, they continued to work passenger trains north and south, including the Orange Express, until the Class 15F replaced them and they were relegated to suburban and local passenger train work. By the early 1950s, the suburban trains to Lynchfield and Melorane were handled by narrow-firebox Class 16DA locomotives which only occasionally worked mainline passenger trains by then. They were withdrawn from service in 1973. Four of the Baldwin-built locomotives were sold into industrial service. No. 844 went to Hlobane Colliery in Natal and later to Umgala Colliery. Numbers 845, 847 and 848 went to Wankie Colliery in Rhodesia, where they became numbers 5 to 7 in reverse order. After they were finally withdrawn in 1982, one of these three was plinthed alongside the main North road at Hwange. Another of the Baldwin-built locomotives, no. 850, is plinthed at Theunissen in the Free State. Works numbers The table lists the Hohenzollern and Baldwin Class 16DA engine numbers, builders, years built, works numbers and variations in coupled wheel sizes. Preservation Illustration References 1930 1930 4-6-2 locomotives 2′C1′ h2 locomotives Baldwin locomotives Hohenzollern locomotives Cape gauge railway locomotives Railway locomotives introduced in 1928 1928 in South Africa