We have just left Crumlin High Level station , heading East in this small, sketchy watercolour of the Neath to Pontypool bound train.
This is the first stage of the viaduct and the train is about to go onto the main section.
In its early life the viaduct had duel tracks but in 1964 it has a single line.
My thanks to Mr D O Packer of Ystrad Mynach for providing details of this view.