Valve gear hi-res stock photography and images - Alamy
Stephenson valve gear - Wikipedia
Steam Engine Gooch Link and Valve Gear Arrangement | ClipArt ETC
Steam Engine Gooch Link and Valve Gear Arrangement Vintage Illustration Stock Vector - Illustration of engine, white: 163235468
Bonhams : A finely engineered 10 inch gauge (scale 8.221) live steam model of a broad gauge GWR 4-2-2 Rover class Express locomotive 'Dragon', The original designed by Daniel Gooch, model built by Ken Woodham,