"mixed" frame had an inside frame for the cylinders and driving wheels, with inside bearings, and an outside frame for the leading and trailing wheels, using outside bearings. The inside frame stopped at the firebox, so that the latter was as wide as the wheels would allow. By this means he minimized the overhang at each end. After strengthening of various members, the engine was three tons heavier than expected. However, it steamed freely and was economical on fuel. It was to this that its success was attributed, along with the increase in boiler pressure that had become possible over the years. However, credit must be given to Joy's suspension arrangements that made it extremely smooth-running and stable. The name "Jenny Lind" was given to the first one delivered to the LB&SCR. Jenny Lind type The new class proved to be so successful that the design was used by Wilson & Co. as their standard design and more than seventy examples were built for various railways, including twenty-four for the Midland Railway. It could be said to be the first to be mass-produced to a consistent pattern. Indeed, the manufacturers charged a hefty premium for variations, although in response to pressure, they later built a number of "large jennies". Other manufacturers and railways also adopted the type. John Chester Craven, Kirtley's successor at Brighton, built a class of five similar "Jenny Lind singles" from 1853 to 1854. An enlarged type was also built by Beyer, Peacock and Company in 1860 for the Portuguese South Western Railway. References Picture Links Drawings "Science and Society" view of locomotive "Science and Society" pen drawing of side elevation Technical drawings, Patent Office Glasgow: Elevation & longitudinal section (Britische Bahn Wiki) Historical photos Historical photo, mid-19th century, “Brighton Engine men with Brighton locomotive No. 65”, pictured in The Brighton Branch of A.S.L.E.F.: The Early Struggles Historical photo “OW&WR ‘Jenny Lind’ Class 2-2-2 ‘Will Shakspere’ ”, pictured in John Speller’s Web Pages - GWR Narrow Gauge: West Midland Railway Individual locomotives of Great Britain 2-2-2 locomotives Jenny Lind