Biographical material includes student notebooks from Finsbury Technical College, diaries dating from 1912 to 1926, and, of especial interest, several drafts of an unpublished biography of Silberrad by his sister Dora and of a revised version by the Hon. Hugh Fletcher Moulton. Included in the book are quotes from memoirs written by Silberrad, some of which shed light on his work at the Research Department, Woolwich, and his relations with the War Office. Correspondence with prominent scientists, 1918-1921, relates to his unsuccessful Royal Society candidature.
Documentation of Silberrad's research and consultancy work is extensive and covers the period 1898 to 1959. It provides significant documentation of much of Silberrad's wide-ranging consultancy work for industry and the government, his patenting of discoveries and business interests. Little material, however, survives from his years at the Research Department, Woolwich. Large groups of correspondence and papers relate to his research on the erosion of ship's propellers and his innovative work on explosives during the period 1911 to 1918 which included the development of ammonium perchlorate dynamites, the 'Hotchkiss-Silberrad Fuse' and a 'flashless' artillery powder. Among the correspondents during the years 1915 to 1918 are the Director-General of Explosives Supply, the War Office and other government departments. Silberrad's involvement in Ergite Ltd is well documented among the papers relating to dynamites. Other topics covered in this section include the manufacture of dyestuffs and cellulose acetate and research on an erosion-resisting gunsteel. There is a series of forty notebooks, 1904-ca 1951, containing details of various experimental work with analysis. A few earlier lecture notebooks date from his years as a student at the University of Würzburg. Other papers document legal cases arising from a few of Silberrad's consulting positions and some in which he appeared as an expert witness. There are also more than one hundred photographic prints, the greater part showing experiments with the 'flashless' artillery powder he developed between 1915 and 1917. Others show laboratories and buildings at Woolwich, 1901-1906, Silberrad's own laboratories and the results obtained by blasting with his new dynamites.
Publications and lectures material is slight, though there are sets of original patents obtained by Silberrad in Great Britain and overseas covering the period 1910 to 1942. There is a significant record of both Silberrad's private financial affairs and the business of the Silberrad Research Laboratories in the form of income tax papers, account books and receipts, dating from 1905 to the years immediately before his death in 1960. There is extensive correspondence, which illustrates the diversity of Silberrad's research, consulting and business interests, and covers the period 1905-1951. The correspondents are chiefly scientists, including Sir Phillip Watts, Sir William Crookes, Cecil Desch and Sir Andrew Noble, family members, principally his brothers Charles and Harold, companies for which he worked, patent agents, solicitors and suppliers.