Robert Dicker was a silversmith.
Dicker was patronised by JW in the 1880s and 1890s. He had premises at 8 Vigo Street, off Regent Street. At his death he was living at 23 Warwick Gardens, Kensington.
His collection was sold at Christie's, London, 25 July 1900.
UK census 1881, from http://www.familysearch.org (accessed 2004); The Times, Friday, 25 July 1900, p. 18.