Beaver
— 09/02/20221931 – List of distinctive marks, trade names and trademarks appearing on bricks, tiles, stone and sanitary ware states that fire bricks stamped ‘Beaver’ were being manufactured by Campbell & Co along with bricks stamped ‘Phoenix’, ‘Vulcan’ and ‘Forth’. Roughcastle Firebrick Works, Bonnybridge, Stirlingshire. Such a brick is still to be located.