I am building a model of the Bagnall 4-4-0 tank shown in an earlier post. The huge volume on the history of Willuam Bagnall has two good pictures plus a narrative of how the order was placed, changes to the valve gear, colour of the engines etc.
You might like to know that manufacturers drawings are available for the Bagnall 4-4-0 tank and the Delta 2-6-2 from the Bagnall collection at Stafford Library for a modest fee on line. The NRM also has the drawings for the Western Oases Naysmith Wilson very large 2-8-2 tender engines.
The Birmingham Library Metro Camell collection has about a dozen manufacturers drawings from the Fayoum Light Railway including all the coach types 1st and 3rd class, open wagons, vans, cattlewagons, flat trucks etc.