This works was located south of Roslin on both banks of the River North Esk. The works were not directly served by rail and had their own internal narrow gauge railway system.
The Ordnance Survey Name Book described the works
An extensive powder manufacture worked by water. The property of Messrs Hay Merricks & Co.
Rosslynlee Hospital Halt
Rosewell and Hawthornden
| Spark Arrester|
Rosslyn Carpet Factory
Old Woodhouselee Tunnel
|Location names in dark blue are on the same original line.|