Christopher Cumming

Christopher Cumming (1860–1933) was a British locomotive engineer who served as Locomotive Superintendent of the Highland Railway at Lochgorm Works, Inverness, from December 1915 until the 1923 Grouping, succeeding the disgraced Frederick Smith and providing the Highland's wartime locomotive fleet with two capable and conventional 4-6-0 designs suited to the demanding gradients and sparse traffic of the Highland's northern main line.

Born at Edinburgh on 15 April 1860, Cumming was apprenticed at Cowlairs Works on the North British Railway and gained further experience at the Great North of Scotland Railway's Inverurie Works, where he eventually became Works Manager. He was appointed Locomotive Superintendent of the Highland Railway in December 1915, following the summary resignation of Frederick Smith whose 'River Class' 4-6-0 design had proved dangerously overweight for the Highland's lightly-built permanent way — a costly error that left the Highland's locomotive power severely depleted at a critical wartime moment.

Cumming's response to the Highland's motive power crisis was characteristically pragmatic: he designed two classes of straightforward, well-proportioned 4-6-0 locomotives suitable for the Highland route's restrictions. The four Clan Goods 4-6-0s of 1917 were modest mixed-traffic engines for goods and secondary passenger working, and the eight Clan Class 4-6-0s of 1919 were larger express passenger engines for the Inverness–Perth main line. Both classes were conservative, reliable designs that served the Highland without drama through the final years of the railway's independent existence and into early LMS ownership.

Cumming retired at the 1923 Grouping when the Highland Railway was absorbed by the LMS. He lived in retirement in Edinburgh and died on 7 October 1933, his quiet competence providing the Highland with the steady engineering hand it needed after the turbulence of the Smith era.