Copy drawings of locomotive engine and tender manufactured by R & W Hawthorn, Newcastle-upon-Tyne for the North British Railway. Locomotive is numbered 26 and plaque on side notes "patent expansion", scale 2ft - 1", drawn 1845: external view from side and above; view from below and internal view from side; from front internal and external views, cylinders and valve gear; details of wheels, axles and other parts.