This was shown again on Johnson's Map of 1820, but by 1888 the OS map shows the works as being disused and in 1909 the ten buildings of the complex were demolished leaving little to be seen today.
This was depicted once more on Johnson's Map of 1820, but by 1888 the OS map indicates that the works were abandoned and in 1909 the ten structures of the complex were demolished, leaving almost nothing visible today.