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C D Young & Co., St Leonards' Iron and Engineering Works , Perth, Edinburgh, and London
1864 Advertisement in the Wellington Independent (New Zealand) offering for sale a number of stationary engines and boilers, and also single and double purchase crabs (winches). The advert was placed by W & G Turnbull & Co., agents for C D Young & Co., St Leonards' Iron and Engineering Works, Perth 
1874 'Charles Denoon Young, residing at Inveralmond, near Perth, sole Partner of the Firn of C. D. YOUNG & Co., Engineers, Contractors, and Boilermakers, St Leonards' Works near Perth, and presently a prisoner in the Prison of Perth, has presented a petition… for liberation…'