Dated 1865. From Various papers including biographical material relating to the life and career of Charles Wheatstone, and patents, 1757-1975.

Papers relating to the Exchequer case Universal Private Telegraph Company v Silver and others, principally correspondence with William Allen Miller (1817-1870), Professor of Chemistry, King's College London, and expert witness, regarding deficiencies in cable insulation of electric telegraph cables delivered by Messrs S W Silver & Co, [Stephen William Silver (1817-1905)], to the Universal Private Telegraph Company, 1865. With test reports on samples of cable and printed Report of the Proceedings of the Meeting Held at the Silvertown India Rubber Works, regarding S W Silver & Co's patent caoutchouc insulator.