Papers of Henry Tinsley & Co., manufacturers of submarine telegraph equipment

Includes order books, invoices, order forms relating to numerous companies: Eastern Telegraph Co., Western Telegraph Co., Eastern Extension Australasia and China Co., Eastern and South Africa Telegraph Co. (all at Electra House, Finsbury Pavement, London), and Muirhead & Co., Beckenham, and Elliot Bros., Lewisham. Also correspondence, with W.G. Pye & Co., Cambridge, India Rubber, Gutta Percha & Telegraph Works, Silvertown, Marconi's Wireless Telegraph Co., Chelmsford, et al.