In early September 2020, while staying in Bream in the Forest of Dean we walked around the Titanic Steel Works and the Dark Hill Ironworks of father and son David and Robert Mushet. These two establishments sit adjacent to what was the Coleford branch of the Severn and Wye Joint Railway. They were also served, in its time, by the Milkwall branch of Severn and Wye Tramway.
The location is significant in the development of the Bessemer Process for making hardened steel. Robert Mushet took the relatively novel ideas of Bessemer and refined them to the point where the process became functional in an industrial context. 
The tramway closed when the Coleford Branch opened as the route of the new railway closely followed the old tramway. There are only a few places where the route of the old tramway diverged from the newer railway and one of these locations is in the area of the Mushet owned works. The next few OS Map extracts come from the very early series of 25″ OS Maps which were drawn in the period from 1873-1888, nonetheless, the old tramway was by this time only a memory,We followed a Heritage Walk route which took us around Milkwall and Dark Hill areas of the Forest.  We encountered a significant section of the old stone sleepers which were used to support the cast-iron L-shaped plates which the trams ran on. Pictures I took at that location follow. I have also included a photograph taken the same week at the Dean Forest Railway which shows how the plates were keyed-in to the stone sleepers using purpose made ‘chairs’.
Generally the modern footpaths which follow the routes of these old tramways are not wide enough to allow both rows of stone sleepers to be seen.
As we noted when looking at the map extracts above, the Sling branch of the Severn and Wye Joint Railway followed the line of the older Milkwall Tramway. Our walk took us, for a short distance, along the line of the Sling Branch. The more modern rails of the branch were supported on concrete blocks similar in size to the stone blocks which once supported the tramway. My picture below shows these concrete blocks where they are still visible outside Fairview Cottage which appears in the third of the four map extracts above.
- https://maps.nls.uk/geo/explore/#zoom=15.577087890792386&lat=51.77809&lon=-2.59762&layers=178&b=1, accessed on 3rd September 2020.
- There is an app which can be downloaded to mobile phones which provides access to a number of different Walks, one of these is the Coleford Heritage Walk, part of which we followed: https://www.forestersforest.uk/projects/12/hidden-heritage-app, accessed on 3rd September 2020.
- David and Robert Mushet: http://www.wyedeantourism.co.uk/mushets#, accessed on 8th September 2020.