NGR Class K 0-4-0ST  The Natal Government Railways Class K 0-4-0ST of 1891 was a South African steam locomotive from the pre-Union era in the Colony of Natal. In 1891, the Natal Government Railways placed five saddle-tank locomotives in service as shunting engines. One was later sold to the Pretoria-Pietersburg Railway, while two more went to the Harbour Board of Natal. In 1905 or 1906, the remaining two of these locomotives became part of the Natal . By 1912, four of these locomotives survived to come onto the roster of the South African Railways as unclassified obsolete locomotives. Five saddle-tank shunting locomotives were delivered to the Natal Government Railways (NGR) from Neilson and Company in 1891, numbered in the range from 89 to 93. The locomotive's cylinders were arranged outside the frame, while the slide valves were arranged between the frames and actuated by Stephenson valve gear link motion through rocker shafts. The boiler dome was arranged above the firebox, with two Salter safety valves which were adjusted to blow off at . The locomotive was equipped with a No. 40 combination ejector and two vacuum brake cylinders, each in diameter. In c. 1896, two of the locomotives were either sold or leased to the Harbour Board of Natal for use as harbour shunters at Durban Harbour, where they were named "Andy" and "Dick King". In c. 1897, another one of the locomotives, no. 90, was sold to the Pretoria-Pietersburg Railway (PPR), where it was named "Natal" and employed as a shunting engine. By 1912, when the South African Railways (SAR) classification and renumbering program was executed, this locomotive had also seen service with the "Nederlandsche-Zuid-Afrikaansche Spoorweg-Maatschappij" (NZASM) and the Imperial Military Railways (IMR) and was still in service on the Central South African Railways (CSAR), who used it as a shop engine in the Pretoria railway workshops. The other two locomotives remained in service on the NGR, where they were later renumbered to 510 and 511. By the turn of the 20th Century they were used on light duties like the testing of the vacuum brakes of passenger trains at Durban Station, such as the depicted "Princess Christian Hospital Train" which was used to attend wounded soldiers during the Second Boer War.