Blue House, Thames and Severn Canal, Siddington, Gloucestershire
Labourers working on the canal at Blue House Reach in the process of puddling or making the canal base watertight through the use of a clay mix. The canal was built in 1789 which was too early to be recorded by a photograph. However this image of the canal being restored to be reopened between 1900 and 1904 shows the techniques that would have been used.
