280 x 225 mm. A view down the gully, showing the stone viaduct rising above the trees. Part of the line on the Western Railway, on the way to the Lapstone Zig-Zag and the viaduct was designed by the Chief Engineer, John Whitton, and the line as far as Weatherboard completed in 1867. It was John Whitton whose determination forced through the attempt to build the railway through the Blue Mountains in the first place.