Mark Sprot and Robert Denholm clay pipe making machine inventors
— 17/10/201609/07/1853 – Patents for inventions. Abridgements of specifications. No 1642 – Mark Sprot
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Garnkirk Fireclay Works, Garnkirk, North Lanarkshire – History
— 03/02/2015Garnkirk Fireclay Works, Garnkirk, Lanarkshire. Canmore Info In 1831 the Garnkirk Colliery and Brickfield
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