Henry Gruning
1856 Henry Gruning joined the business of Slaughter, Stothert and Co; the company became Slaughter, Gruning and Company.
1860 March. Robert Stephen Cuthbertson retires from the partnership leaving Edward Slaughter, Henry Stothert, John Stothert, John Stevens and Henry Gruning of the Avonside Iron Works, Locomotive Engine Manufacturers, Ironfounders, and Makers of Machinery trading as Slaughter, Gruning and Co. [1]
1864 March. Director of the Avonside Engine Co. His address is given as Grove House, Highbury, London [2]