CGR 1st Class 2-6-0ST

A pair of Stephenson's Patent back-to-back Mogul type side-tank locomotives were delivered to the Cape Government Railways (CGR) from Kitson and Company in 1876. They arrived in Port Elizabeth on the ship Queen of the West on 21 February and were numbered M15 and M16 in the Midland System's number range. ==Characteristics==

The locomotives were built as permanently coupled back-to-back tank locomotives, a configuration which allowed the two engines to be operated by a single crew. A similar pair of 0-6-0T back-to-back locomotives, built by Robert Stephenson and Company, was delivered to the Eastern System in East London in that same year. Their feedwater pumps, attached to the right hand side of their spectacle plates, were actuated from the piston crossheads. The locomotives were also each equipped with a small feedwater injector feed, attached to the left side of the smokebox, for use in cases of emergency or while the locomotives were stationary. The injector had been invented by the French engineer Henri Giffard in 1852. Tyre wear was reduced by supplying jets of water, fed from diameter pipes, to the leading wheels while negotiating curves. This was found to diminish friction significantly. Their cylinders and slide valve faces were lubricated by tallow cups, attached to the sides of the cylinder assemblies. When melted tallow was later found to be unsatisfactory, it was replaced by vegetable oils. ==Service==

Cape Government Railways It is not known whether this back-to-back pair displayed the same instability in operation as the 0-6-0T back-to-back locomotive pair on the Eastern System, but by 1881 they had also been separated. In the process they were rebuilt to saddle-tank engines for use in shunting service in Port Elizabeth, where both spent the rest of their service lives. When a classification system was introduced on the CGR, they were designated . By 1912, both locomotives still survived to be taken onto the South African Railways roster. Since they were considered obsolete, the locomotives were designated Class 01 and renumbered by having the numeral 0 prefixed to their existing numbers. Even though they were considered obsolete and no. 0415 was scrapped in 1916, no. 0416 was only scrapped in 1946, after seventy years in service. ==Illustration==

File:Ex CGR 1st Class Kitson, SAR no. 0416 on Playing Card.jpg|SAR Class 01 no. 0416 ==References==