Found in Trinidad. This is not in my possession. Cityside Brick, Pipe and Fireclay Works, Greenhill, Glasgow. . . .
17/05/1878 – Glasgow Herald – To contractors and others – MacDonald, Eadie and Waddell have opened Cityside Brick, Pipe and Fireclay Works, near Bellside and are prepared to supply composition bricks and all kinds of fireclay Goods on the most reasonable terms. Cityside Works, by Holytown.
also possibly relevant
1878 – McCulloch Hamilton and Co – Brickmakers Cityside, by Holytown, Lanarkshire
1882 – Robert Hamilton, Brickmaker, Cityside, by Holytown (page 57).