On a recent trip to Manchester I was able to take a look at the site where James Derbyshire's second factory once stood. Named the Bridgewater Flint Glass Works, it was in operation from about 1868 to 1879. The site has been reused at least twice since, and the latest demolition had recently finished when I passed by, which gave a clear look at the floor area.
It is believed the works were concentrated on the northwest quadrant of the plot of land.
The first picture looks northwest with the larger rubble mound on the right being roughly where the core part of the factory once was. On the other side of the high wall you see behind is Trentham Street itself. Some parts of the wall may date from the Victorian era.
The second picture was taken from the southwest corner looking northwest, along the line of the surviving wall. The trees at the back mask the railway line, behind that is the Bridgewater Canal, and then the Manchester Ship Canal.
One registration is directly ascribed to these works, RD 305541 from Nov 28th 1876, which I suspect is a railway carriage lamp.