I. C. Johnson and Co
of Greenhithe and Gateshead, Cement plant.
Mr I. C. Johnson set up cement works at Cliffe, Greenhithe and on the Tyne[1]
1875 Isaac Charles Johnson and Co, cement makers, of 25 Great Tower Street, London EC[2]
1887 Contract for cement for St. Helier Harbour
1900 Became part of Associated Portland Cement Manufacturers