The LSWR X2 class was a class of express passenger 4-4-0 steam locomotives designed for the London and South Western Railway by William Adams. Twenty were constructed at Nine Elms Locomotive Works bet
LSWR X2 class locomotive no. 577
4-4-0, in the Whyte notation, denotes a steam locomotive with a wheel arrangement of four leading wheels on two axles, four powered and coupled driving wheels on two axles, and no trailing wheels.
An 1880s woodcut of a 4-4-0 locomotive
1856 relief sculpture of a 4-4-0 commissioned by the Norris Locomotive Works, depicting an early model prior to the adoption of the covered cab
Remains of a 4-4-0 locomotive of the Richmond & Petersburg Railroad, Richmond, Virginia, 1865
Short wheelbased St Lawrence & Atlantic Railroad Coos, c. 1856, Longueuil, Quebec