The latter had Gray's patent dog-leg valve gear and were, apart from another built experimentally by the Haigh Foundry, among the first to use expansive working.
Further engines were made for the Hull and Selby, two 0-6-0s and two singles for the York and North Midland Railway.
The company continued building mostly Stephenson long boiler locomotives, some 2-2-2 followed by outside-cylindered 2-4-0 with the firebox behind the wheels.
The Railway Foundry, Barnsley, was a separate concern, owned by Mr Longbottom.
[3] A previous version of this page said that he was the father of Luke Longbottom, who was Locomotive Superintendent of the North Staffordshire Railway from 1882 to 1902.