Found by Eddie McLean in the Glasgow area. This stamp is likely to have had at least 4 numbers. Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge. alt Calder Firebrick Works, Airdrie, Lanarkshire. alt Chapelhall Works, Lanarkshire. Hepworth Ceramic Holdings plc (GR-Stein Refractories Ltd. parent co) bought the Bonnybridge Silica & Fireclay Co. Ltd in 1972,…
Drum Fire Clay Mine, Bonnybridge, Falkirk, Stirlingshire was possibly situated adjacent to Bonnybridge Station.
24/12/1909 – Drum Fireclay Mine, Stirling – Bonnybridge Silica and Fireclay Co Ltd – Alexander Cook (26), Drawer – While engaged breaking up ganister to fill into a tub a large stone fell of the face and killed him instantly.
13/09/1916 – Falkirk Herald – James Innes, miners’ drawer, Waverley Place, High Bonnybridge, was charged with having, on 1st September, in the underground working of Drum Mine, High Bonnybridge, occupied by Bonnybridge Silica and Fire Clay Company, Ltd., assaulted Peter Johnstone, miners’ drawer, Wester Lochgreen, Bonnybridge, and struck him to the face and cut his lip. Accused tendered a plea of not guilty, and proof was fixed for Thursday, 21st September.
Below – Information – British Geological Survey. Ganister from the Top Ganister Bonnybridge Fireclay Works, Stirlingshire
Ganister from the Top Ganister Bonnybridge Fireclay Works. A number of works and mines were active in the Bonnybridge area. They worked and processed the Carboniferous, Millstone Grit Upper Fireclay, a series of fireclays and ganisters.
The works at Bonnybridge included James Dougal and Sons Limited working the Bonnyside Pit and the Bonnyside Fireclay Works (the only pit recorded working the ‘Top Ganister’); the Bonnybridge Silica and Fireclay Company working the Drum Mine; Dykehead Ganister and Firebrick Company Limited working the Dykehead Mine and the Glenyards Fireclay Company working the Glenyards Mine.
The ganisters were usually crushed at the works and sold in the ground condition to steel manufacturers for lining converters etc. Mixtures of ground ganister and fireclay were also
supplied to foundries and chemical works.